Wrong. Threads like these are not only allowed, they're encouraged.
Yes, we want people to try new genres and expand their tastes, which is why we have no in-site navigation function that pigeonholes music into specific genres. We don't decide what genre a piece falls under; that's not our call. Conversely, we don't have artists define the genre either, because we control the database and we're not about to fill it up with the thousand-and-one obscure genres that artists would specify (thereby defeating the purpose of genre-classification entirely).
We've always allowed threads like this to exist for all different styles: piano, orchestral, remixes with vocals, really high-energy music, etc. Making threads like this encourages discussion and does broaden people's musical tastes because of how subjective and wonderfully inaccurate genres can be. Case-in-point: I'd never recommend Ancient Hero or Space Drifter to anyone looking for new age remixes; one is orchestral, the other is some kind of weird synth-rock-jazz-whatever fusion; but clearly Flare4War thinks it's a good fit for what's being asked for.
There's absolutely nothing wrong with these kinds of threads, and I would really appreciate it if you didn't try to discourage people from posting their recommendations in them.