In higher-level content (read "Savage," "Criterion," etc.), I can see status effects, both dispellable and non-dispellable, being useful parts of the fight for ramping up the complexity. In base-level content...put simply, people are playing the game to relax and have fun, and status effects like paralyze, blind, silence, etc. just mean you're not doing things and thus not having fun. I can see why over time status effects have begun much less of a thing in base-level content at least.