Well with short form videos your feed could be something more like a Twitter feed where you scroll through content from the accounts you follow instead of a grid of recommended videos where you click on one that sparks your interest. It is a different experience. Just like you could have a blog where every post is under 140 characters but why do that when you could just use Twitter. (disclaimer I do not claim to understand what has happened with X/Twitter now just assume I'm talking about old Twitter lol)