The counterargument to that (I'm not taking a stance on it, but I get why others would) is "it's already obvious, look at their past history and what they've already done just within the past few days".

Let's play Global Thermonuclear War.

DIR CAKE.EXE

I'll see your Uh-oh! and raise you https://youtu.be/pnIiui46ggY

Yeah, the argument for ditching Lemmy entirely is "these are the devs themselves, even by using other instances you're indirectly promoting them". The counterargument is "the more instances that don't fit their style, the more you're diluting said style".

Compare/contrast e.g. Mastodon and its default instance (mastodon.social, iirc):

• There are a lot more Mastodon instances than Lemmy instances
• Some of them are more obviously problematic than m.s (e.g. Truth Social)
• ISTR criticism of m.s being lower-key on its own, like "too big, stuff lost in shuffle" and/or "too slow to defed obviously problematic instances"

Sorta related: Is anyone at SDF considering starting a kbin instance? (Apparently the Lemmy devs are condoning some unsavory stuff on their own instances, and while the whole point of decentralization is "if one goes south then you can just switch to another", I get why some people want to take things a step further.)