You're assigning a connotation to the word that I don't really agree with. There's nothing wrong with being a lurker.

There's encouragement to not be a lurker in the fediverse simply because engagement drives adoption and traffic, but I think the goal is ultimately to attract more lurkers

This makes absolutely no sense. The smaller the community is, the easier it is to migrate. They could just go to literally any other service.

The community is the people, not the platform.

I'll echo this sentiment. I also lurk communities that I don't agree with, and I want to see dissenting views. I find that heavy moderation often just leads to echo chambers where real issues can be kicked under the rug

Is there a place to see what's blocked, and why?

/r/pics is one of the strongest protest subs on my feed right now, I think it's the right idea. /r/interestingasfuck is even better.