I think it’s considered a custodial wallet. It’s also tied to your email so it’s not as private and safe as you would usually hold your own keys.

I use it too for lightning and zaps on nostr. It’s just the easiest way right now. There’s different levels of security. Just don’t hold all of your keys on wallet of satoshi and you’re fine. It’s the trade off you take for little fees and ease of use.

There’s no reason you would be a shitcoiner, they’re just being stupid.