I pieced the OP together from a quote of it. I don't know if it is complete, but here it is, along with my own responses.
AS AN ITF TAEKWONDO WITH 9 YEARS OF EXPERIENCE I AM TIRED OF HEARING ALL OF THE TKD BASHERS .THAT TO ME IS AN ACT OF CLOSED MINDED AND CONFUSED PEOPLE. (NO OFFENSE TKD BASHERS)
I'm with you on being tired of it.
FIRST OF ALL I BELIEVE WHO ARE U GUYS TO SAY O TKD SUCKS,THEY ALWAY KICK HIGH,SINE WAVE IS DUMB AND THIS AND THAT WHEN U GUYS USUALLY GO BY WHAT U HEAR AND SEE AT CERTAIN MCDOJANGS.
NOT ALL SCHOOLS ARE LIKE AS FEW AS U UNDERSTAND.
I agree; the art should not be judged on the basis of bad schools, as there are plenty of good schools out there as well.
WHEN I HEAR U GUYS SAY THIS ITS THE WORDS UED EXPECT FROM NON MARTIAL ARTIST.
It is what you'd expect to hear from people who simply like to be negative. And MA-ists are not immune to negativity, as I see plenty of negativity on most MA boards.
U KNOW THE GUYS WHO ARE ALWAYS DOING THE KARATE KID CRANE THING,MAKING THE BRUCE LEE NOISE
I'm not sure if this is a part of the OP that didn't get quoted or if it is the non MA-ists the OP mentioned above.
NOW IT IS TRUE THAT TAE KWON DO STYLIST kick HIGH AND FOR THAT REASON I DONT KNOW.
Because we can!

That and kicking is a part of Korean culture. Regardless of the provable amount of any actual training in taekkyeon by the pioneers, taekwondo is most certainly influenced by it, and part of takkyeon was high kicking.
BUT I DO KNOW IN MY SCHOOL WE ARE TOLD TO KICK BELOW THE WAIST IN AN ACTUAL STREET ACOUNTER.
PERSONALLY I DONT KICK above THE SOLAR PLEXUS.
The OP had originally said 'below,' but in a subsequent post said that he had meant to say above, so for the purposes of responding to his original thought, I have made the correction.
Regardless, at virtually every TKD school where I have trained, practical self defense has been taught primarily with hand techniques and with foot/let techniques being solar plexus level or below.
NOW I BELIEVE THERE ARE MANY CONS TO KICKING AT THE HEAD SUCH AS LOST OF BALANCE,EXPOSURE OF YOUR LEG KEEPING U BALANCED EX.THE PROS CAN BE AN KNOCKOUT OR THE DROPPING OF THE PERSON U KICK.
NOW IMMAGINE IF YOU WERE TO KICK SOMEONE AS HARD AS U CAN WITH A HOOK KICK WITH YOUR HEEL ARE A TURNING KICK WITH THE TIP OF YOUR SNEAKERS OR SHOE THE RESULTS WOULD BE DRAMATIC AND NOT GOOD FOR YOUR ENEMY.
High kicks are like any other technique in self defense; use them when appropriate. There is no self defense technique that is without both pros and cons.
NOW LETS GET ON SINE WAVE NOW I MYSELF WAS TAUGHT SINE WAVE CORRECTLY BUT NOT TO THE DEGREE OF MOST ITF SCHOOLS WHERE THEY EXAGGERATE IT.
JUST PUT IT LIKE THIS I WAS TAUGHT THE WAY WHERE IT CAN BE COMBAT EFFECTIVE
BUT COME ON IN A 1 ON 1 WHO WOULD REALLY GO DOWN UP DOWN TO PUNCH SOMEONE WHERE U CAN PUNCH SOMEONE AND PUT YOUR WHOLE BODY INTO IT.
TO ME SINE WAVE AND ALL OF TAEKWONDO TECHNIQUES ARE MEANT TO PUT YOUR BODY INTO ALL YOUR TECHNIQUE
.AND TO DO THIS U MUST USE SOMETING CALLED CONTROOLED LOST OF BALLANCE.WHICH CAN ME FOUND MOSTLY IN MOVEMENT 18 IN DAN GUN TUL.WHEN U GET TO THAT MOVEMENT U MUST SWING YOUR BODY INTO THE STRIKE INCORPORTAING YOUR BODY MASS AND HIPS INTO THE STRIKE.(I HOPE ALL THE ITF PRACTIONERS CAN UNDERSTAND WHAT I AM TALKING ABOUT)TO EXPLAIN WHAT I CALL CONTROLLED LOST OF BALANCE U ARE BASICCALY TROWING YOUR BODY INTO EACH BLOCK AND STRIKE TO PRODUCE POWER IN YOUR TECHNIQUE.
No comment on any of this, as I do not practice ITF taekwondo or its associated sine wave method.
NOW 1 THE REASON WHY U BASHERS THINK TAEKWONDO DOESNT HAVE ANY HAND STRIKES ARE PUNCHES BECAUSE U NEVER STAYED IN IT PAST BLACK BELT WHERE MOST OF THE REAL HAND TECHNIQUES COME IN.
I don't know about ITF taekwondo, but the bulk of KKW pumse have always been hand techniques.
TAEKWONDO ALMOST HAS THE SAME AMOUNT OF KICKS AS IT DOES HAND STRIKES IF U WANT TO GET TECHNICAL WITH IT.
Actually there are more hand/arm techniques than kicks.
WHY REAL TAEKWONDO HAS FALLEN APART IS BECAUSE ITS MANY INSTRUCTERS THAT RUN MCDOJANGS,THE SPORT ORIENTATED WTF TECNIQUES,THE EXAGGERATION OF SINE WAVE, AND BECAUSE OF THE FACT THAT MUST INSTRUCTERS DONT INCOPORATE ENOUGH BOXING TECHNIQUES.
Except that taekwondo hasn't fallen apart and there are no special sport oriented WTF techniques. And why would TKD instructors teach more boxing techniques; taekwondo isn't boxing. In fact, boxing is more sport oriented than taekwondo.
SOME PEOPLE ALSO BELIEVE TKD HAS NO GRABS OR PRESSURE POINTS STRIKES.THERE ARE ENOUGH ALONE IN PATTERNS.THERE IS EVEN A NERVE STRIKE STRIKE IN CHON JI.
THERES GRABS IN WONHYU,YULGOK, AND MANY OTHER TULS.BELIEVE IT OR NOT TAEKWONDO HAS MANY RELEASES FOUND IN PATTERNS SUCH AS HWARANG AND JOON-GOON.
Such things are found in KKW taekwondo as well. The fact is that taekwondo is predominantly a striking art, but yes, there are other techniques in taekwondo as well.
Anyway, I responded for the benefit of people reading this thread, as Kwon17 will likely never see any of this. Wherever he is, I wish him well. It would be interesting to know if he's still practicing.