I think your argument would be valid if we were still back at SF2. But it’s 20+ years later and we’re at the tail end of SF4, and the concept of footsies is almost as old as the series itself. Having a bit of the tutorial that talks about controlling space and the various concepts of the game like Counter Hits itself wouldn’t hurt and it would be simple to make. It’s not like you have to create any new in-game property for it. Capcom’s just lazy. Other games have touched on it, why won’t Capcom, especially when they’re the maker of the most popular fighting game that isn’t Tekken? Capcom said initially that SF4 was going to help teach a new generation of players how to play fighting games (in so many words anyway) but they have the most bare-bones tutorial/trial mode of probably any game this generation (of the ones I’ve played anyway.)
There are plenty of worthless combo and link trials, why not use some of that space to say, “Hey, your low Forward kick is good when your opponent is here, and is quick/Low Fierce is good when your opponent is jumping at you/etc.” How hard is that? Footsies is a bit of an abstract idea, but trying to make some sense of it and presenting even a basic idea of what it is will go a long way. It doesn’t have to be complete and really long, just touching on it would help a lot.
It seems like you’re on the “well, I had to do it that way, so why shouldn’t they?” bandwagon, and you have yet to provide a reason as to what would be wrong with an in-game tutorial other than, “fuck new people, let them hunt for that shit.” Do you drive a horse & buggy instead of a car because “that’s how they did it back then?”