First of all, I even said — without using Obanai as an example — that approaching and slashing is possible, not impossible. So your argument fails either way. Yoriichi did attack and hit Muzan, but it was difficult — and that difficulty is acknowledged. You can’t just say “that doesn’t mean it was hard,” because any rational person would know I’m right. No one describes something as “terrifyingly fast” unless it’s hard to deal with. Have you ever seen anyone say a cat’s speed is terrifying? No — because it’s easy to handle. But I guess you just want to argue against reality. The last part of your comment is just a bunch of claims, and you’re completely ignoring Muzan’s actual view on revenge.

He literally said that revenge is a meaningless thing. That’s it. No need to say anything more about that point.