Interesting argument, I will say that the reason could be related to the fact that this is a Bitcoin niche, thus, the currency of the land is BTC using LN, spending time and money on bots and algos to sell us crap is very hard,  here is the toughest crowd for them, monetizing from us would be quite hard, most here are technically and financially savvy... 

But, in the future, they may understand they need to join us to sell their ideologies, propaganda and crap, it would be an interesting batlle if that happen, but I agree with nostr:nprofile1qqszrvdccr50wer7ffnghp759sxsgjmv4p0cuaft450mdprehe9vj2gpzamhxue69uhhyetvv9ujumn0wd68ytnzv9hxgtcr4q9l0  , I choose freedom as well, if I wanted censorship I stay in X or any other centralized social network. Filters work well, muting works well. That is enough to filter out spam