Not sure I understand tbh. Seems exactly the same?

You get banned in a reddit community you can't access it, you get banned in a lemmy community you can't access it.

I've been banned from reddit communities and can still access reddit. If you've been banned from Reddit completely you must have done some terrible shit.

In your example, you're also suggesting a transphobic person has more scope on Lemmy to continue being transphobic than on Reddit. That's not a good thing?

I am quite confused by your post tbh.