In reference to this; most of the kicks involved in tricking evolved out of flashy TKD kicks. If you can find a legitimate practical and pragmatic use for any kick I name (which I consider among those garbage kicks) and it is within the realm of plausibly happening in either the street, or survival, I will take back what I said.
Then I hope you noticed my arms. They're there for defense, not to look pretty. And if you look closely, you'll also see me do just that.
The minute the other attempts to kick back, I kick above or below the knee negating. They want to charge in, easy front side-kick to jam them. And if they actually are pressing me, it's not hard to put the leg back down. If you were to try to back-kick against me with my leg raised, you would find me on top of you before you even had your hips turned. It's common sense, when someone is turning, spinning, CHARGE.
I'm amazed people aren't bringing up the two easiest counters to a spinning, or reverse kick. Move back or to the side, striking a foot or two in front of where you were, or as they turn, to charge in, striking the base leg or anything more vulnerable which is tactically valuable. You time it right, you can even kick their backfoot which can throw them forward off balance.
Your first paragraph: it's not about the kicks, it's about what you are saying about an art that people feel strongly about. You're art bashing. It's sad.
You included back kick as garbage. I've shown you that it isn't, below.
Your second paragraph: utter rubbish. Even a shabby full contact player can get past that kind of tiptap front leg play. And your arms? They don't enter into the equation when you're on one leg; a good back kick will push them onto your chest and you onto your ***.
3rd para: Shows you have no idea what you are talking about with this kick. You charge, you lose. Also, I'd avoid using 'you'. It makes one sound personal. If I personally back kicked you, you don't know what would happen.
People have already suggested that this is not a kick to throw off the line. You don't seem to be listening to that. It's one to throw when the opponent is off balance, mid step, or committed to an attack. It's usually thrown defensively, moving backwards, as in the vid Cyriacus posted. How are you going to do any of the countering you suggest when in the 0.2 seconds the kick takes to reach you, the first thing you have to do is regain your balance and get a foot back down before you can counter?
Last para: Again, rubbish. People aren't bringing up those counters because the people on this thread understand what a fast and devastating kick back kick is, and that those counters will only work if you manage to take a luckily timed step coincidentally. This kick is thrown when you are off balance. You won't be able to counter. This last paragraph tells me that you've never come up against a decent back kicker and you can't use it effectively yourself. That doesn't make the kick 'garbage'. A shoddy workman blames his tools.
The best way to deal with your lack of understanding would be to acknowledge that you might not know everything, and ask the good people of this forum 'how can I make back kick work?', rather than regaling us with fantasy stories of how you would counter our kicks.
I think you need to go test your theories against a good kicker. Everyone has a theory until they get hit.
Gnarlie