@ambv For starters, hashtags already act as labels. It is possible to filter out content by hashtag, so it serves your purpose well.
That said, sounds like your on the wrong side of the fediverse. You tend to have three types of servers... The extreme left, very liberal, but also very quick to block/silence over silly things like not CWing, and this is where you see the heavy pressures to CW.
Then you have the extreme right wing, they wont ban for anything and generally a lot of their users go around harassing people or at least being very confrontational and rude. They will never CW anything except maybe nudity. They are in many ways the opposite of course.
Then you have a rare few instances, like QOTO, that are very neutral... We generally like to encourage people to speak freely, even about unpopular opinions, we talk to people instaed of banning them most of the time, though we will ban if someone is a bad enough actor. We only really CW things that are not safe for work.
Long story short, CWuing everything is not really something that is the norm ont he fediverse outside of a few very restrictive communities.