Yep! Reddit is still pretty awful in many respects (and I only even bother with it for specific communities for which I haven't found a suitable active equivalent on Lemmy - more frogs and bugs on Lemmy please), but it did get notably less unpleasant when the majority of the truly terrible subs were banned. So it does make a difference.

I feel like "don't let perfect be the enemy of good" is apt when it comes to reactionaries and fascists. Completely eliminating hateful ideologies would be perfect, but limiting their reach is still good, and saying "removing their content doesn't make the problem go away" makes it sound like any effort to limit the harm they do is rendered meaningless because the outcome is merely good rather than perfect.