I'm not offended in the slightest that you don't idolise Peart, Portnoy, etc. They're not your taste and that's totally fine.I agree with those being fightin' words to most, but me, I don't find him or any other progressive drummer's style hard to play, if anything you just have to memorize a lot of different parts (and that would be the difficult part not the playing but the memorization) but I find that style boring... Rush or any progressive bands are to me more about showing chops than actually having a good groove. I do like some songs from them but I would not buy an album or go to a concert (and now that he is dead you can't anyway). I feel the same about Dream Theater, Tool... Highly overrated drummers not particularly hard to play but just a bunch of memorization.
I also totally understand (even agree with to a point) that their playing style can be too flashy and not groove like other players, but to call their skillset "just a bunch of memorisation" (as if memorisation and execution are the same thing) is reductive to say the least.