Except it's very hard for your average person to get a hold of spendable bitcoin. For most normies it's de-facto impossible. Even Strike has just removed all debit card top-ups. You're asking creators to monetise based on a currency their followers don't have and cannot get. Makes little sense.

I don't know why this point is constantly glossed over.

It's possible to care about nostr more than about bitcoin, and if that's you then stablecoin zaps are going be a lot more useful for creators looking to monetise.