There's that, too.Well, it sounds like a de facto ultimateum at the very least. I mean, he's essentially saying I'm not playing drums any more and here is the option if you guys want me to stay in the band. The only thing I would add would be that it may need to be taken into account might be whether the ex and future non-drummer is a favorite with the band's following, or maybe not. Supposedly Pete Best was a fan favorite but still got fired.
For me, I try to stand in someone's shoes, so I look at it as if I had a hand injury or something that made playing not fun anymore. I'd either have to quit or I'd have to find another way to be useful. Just the way it is. No need to turn it into anything else. But it would be helpful to these guys if they actually knew why the drummer wasn't wanting to play drums anymore