I didn’t say “defederate them”; I said that I didn’t know why other instances were defederated when that instance is worse. I intentionally didn’t say defederation is bad or good because that’s irrelevant.
Also, different people have different views on defederation and its relation to the Fediverse. In my experience, curating away from content harmful to your users is important to creating healthy communities.
Honestly, your instance has gotten worse over time in that regard too. Lemmy.ml used to be one of the better instances in that regard but the influx of Reddit users caused quality to crater and weird propaganda-ish pro-America/pro-capitalism stuff (and, not coincidentally, more racist/transphobic stuff) to start flowing from .ml. Probably not anything worthy of any block/defederation because ml still has decent content and a lot of good users but I sometimes am surprised by the stuff that comes out of there.