“ why should a Speaker who is effectively working within his caucus worry about that rule”
Because McTurd plans to step on conservatives
If McCarthy "plans to step on conservatives" as you say, then we have to believe that there will be five votes to motion to vacate the chair.
I think that at some point this has become so personal for some people that they are unwilling to move off of their initial positions vis a vis McCarthy. They might have for someone else, but not McCarthy, only because it's McCarthy they'd be compromising to.
In that sense, it's a little like some behaviors I've seen here on FR, where some posters just refuse to concede a point, especially when that concession is to particular other FR members. It's sad to see that same behavior metastasize in the House, but then I suppose it really is a reflection of the hot tempers of the people after all.
-PJ