lemm.ee is centralized in Cloudflare’s exclusive walled garden. I can’t speek for the admins but it’s antithetical to the purpose of the fedi to advocate for federation with centralized hosts.
And there are consequences. If an image is posted to Lemmy.world, sh.itjust.works, or discuss.online, those of us who are excluded from Cloudflare cannot see it. A non-CF node federating to a CF node creates a broken network.