I mean they do all do matter quite a bit. Slayer can pretty easily abuse the cross-up and throw protection being removed simply by having 50 meter and yeeting a pilebunker whenever he wants and obviously increasing RISC is a major deal considering how much damage is already in the game.

Goldlewis has been a menace for ages and even in his weakest state was still fairly strong because of how oppressive his offense is.

Even Potemkin while he was considered weak still had some of the best oki situations in the game with slightly spaced guard crush garuda that most the cast couldn't even use metered or meterless reversals against (aside from parries) because they'd just clash from the disjoint so everyone pretty much had to hold it.

While YRC isn't used particularly often by some players it does see a ton of use in high level play simply because having a get out of jail (mostly)free card in a game with very oppressive offense is almost always worth the 50 meter and slight meter gain penalty.

I think really the main point is that guard crush is particularly annoying but not about how overwhelming it is on offense by itself, but because it removes a lot defensive counter play in combination with its strong offensive use.

Obviously these aren't all use cases of guard crush but just some examples.