No reason why we can't have both. People fill up fedi hashtags with garbage on purpose, there is no reason that won't happen here too.
Discussion
so if someone fills a tag with garbage i would call that #tag misuse, so enter #moderation on that tag or maybe just report the user for spam or tag misuse, and maybe tag misuse #reports hides them from all your tag views
yes we can have both and should because the best should win out in open adoption, i have used communities and the approval aspect is quite dumb, there is also lots of dev on communities but not #tags and filters ie including moderation
i think filters are core to #nostr, after all a follow feed is just a filter