Taekwondo includes many different techniques. Theres a half dozen basic kicks, and several types of punches and open-hand techniques.
Well, there's certainly more kicks, and more than "several" hand techniques, but you're new enough that you may not have been exposed to them yet.
There's even some grappling, even though most dojangs don't teach it.
I'd question the basis on which you've determined that this is true of "most" dojangs. How many have you been to, and how well do you know their curriculum? There are certainly schools that are so focused on WTF-style sparring and the KKW minimum requirements for rank that they neglect to teach (if they themselves were ever taught) the full scope of TKD, but I'm always leery of overgeneralizations.
You have even more techniques if your instructor has cross-trained.
Or if your instructor just teaches the full scope of TKD.
However, in WTF sparring, all you use are roundhouse kick, back kick, crescent kick, hook kick, and pushing kicks.
Well, no... you see front kicks, axe kicks, spinning kicks of all sorts, mid-section kicks, high kicks... and more importantly, you see combinations of kicks. Although the roundhouse is absolutely the most commonly seen kick in WTF sparring.
Other combat sports use less protective gear and Llow more techniques. Is WTF Taekwondo too restrictive? Or is it good that it focuses on kicks?
Do you prefer the rules from another TKD organization? What would be your rules for TKD sparring?
Obviously, (since I've said so many times) I consider the WTF ruleset needlessly (and even harmfully) restrictive. There is absolutely no reason you cannot emphasize kicks (with bonus points based on the difficulty of the kick) while still allowing the use of a wider selection of TKD skills.
At our dojang, we use different rulesets. Most commonly, we follow the WTF convention of no low kicks, and we award bonus points for high kicks and additional bonus points for more difficult kicks. We also allow punching to the head. We do avoid contact with the face, simply because it's too easy to bloody noses and split lips.
With more advanced students, we at times allow low kicks, sweeps, throws and takedowns. In those cases, points will be awarded for the technique, and we will allow a couple seconds for them to follow their opponent down and execute another strike. We don't turn it into a ground game. TKD is primarily a striking art, after al.
We require pads for the hands, feet and shins. We strongly encourage, but do not mandate, cups and headgear. Hogu are available, but very few choose to use them, and those are all newer students. Lower ranks are required to use lower levels of contact than higher ranks. Most (but not all) of the black belts prefer to go fairly heavy on the contact when sparring each other. When there is a difference, the lighter level of contact is used.
As for helping you fight in the UFC or the Bar, it is, then OK to seek the forbidden fruits of the other arts. 
