If it didn't exist, the dulling effect of it wouldn't exist. But it exists and it's tangible. You probably don't notice because you're writing about your area of expertise (which conveniently happens to be Nostr) and receiving lots of feedback because you have a gazillion followers.

The avert human responses and the measurement of them being the algo results in an intellectual "flight to safety", where there are a few popular topics and correct opinions and you can hardly break out of that mold, even if there is an audience for it.