Most also doesn't. It's just the tankies who does that. Many of the Lemmy devs are tankies, and the instance they set up lemmy.ml is as full of tankies as lemmygrad. So many of the popular communities hosted there will have a heavy tankie slant.

In the wild tankies are a fringe minority, but for these particular historical reasons, Lemmy has had a disproportionately high amount of tankies who have been dominating many communities. I think with the reddit influx their hold has somewhat diminished, and it should continually do so as the amount of Lemmy users grows.