The vast majority of characters have options to counter the vast majority of the opponent's options. You talk as though Player A's option beating Player B's option is the be-all-end-all of it, and just because that is the case, Player B's option is significantly less effective. You talk as though how safe Player A's option is, how versatile it is in terms of timing, how usable it is on reaction as opposed to read etc. doesn't really matter.
I'm gonna assume you're not dumb, you know this already. For example, if Cloud Dtilt is purposely designed to counter SH approaches, ie. one of the most common things to see in the neutral game at all levels, you'd see it used all the time right? Except you don't. The reason is Cloud Dtilt is really unsafe. It is high-risk, high-reward. You're not going to use it often against ZSS because committing to a high-risk move against ZSS (especially with a vulnerable recovery) is asking to get killed or get half your stock eaten. It is quite easily baited by a character with some of the best overall mobility stats and frame data. It is, in fact, Cloud who is playing the dangerous game by preparing to counter ZSS's versatile aerial approaches with Dtilt.
If you think knowing what one can do in response to seeing an opponent do something is huge, then the opponent knowing how safe this likely option is (did you really suggest NOT thinking about your options much? This is how you get conditioned and blown up) and how to punish it (in the case of Cloud Dtilt, easily) is enormous. This comes under matchup knowledge.
Don't say dismissively "yes, there is more to those interactions than that". This stuff is more important than X beats Y.
It's easy to talk in black-and-white and not mention the caveats of baiting, reactions/reads, risk-reward etc., and it's easy when discussing metagames to talk about something's strengths and forget to mention its weaknesses. It doesn't help tho, cause then people just respond with "uh no, doesn't work like that" and get sarcastic and unproductive. Think and discuss relatively and we'll get further and learn more.
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If we're talking top class OOS games, don't forget about
and especially
.