organizers are worth it if you actually care about setup speed and piece management, but ziplock bags work fine if you're not bothered by chaos. the real question is: how often do you replay games, and do you have kids or pets that might spill everything? if you're someone who plays the same 3-4 games regularly, an organizer cuts setup from 10 minutes down to 2, which matters. but if your 15 games sit there and you rotate through them slowly, bags are honestly sufficient and way cheaper.
the $30-50 per-game thing is kinda steep unless it's a complex game with 200+ tokens. most people who buy organizers do keep using them long-term because they solve an actual problem - pulling out a game and having everything sorted beats fishing through baggies. that said, plenty of folks never bother and just deal with the mess. if your closet organization bothers you enough that you posted this question, you probably lean toward wanting organizers.
what might help: start with maybe 2-3 organizers for your most-played games and see if the convenience justifies the cost for you. some people print custom inserts for like $3 online instead of buying the $50 versions. are there particular games driving the mess - like one with tons of tiny pieces?