Afaik it's a normal transaction but the inputs and outputs will give it away, true. Cashing out usually involves your ID though, not sure if that's better.

Yes, look at this recent Wasabi coinjoin, they do get quite large and are can be fingerprinted easily.

It's the same with encryption, you know that there is some encrypted message, but you have no clue what's the actual content.

https://mempool.space/tx/4988e9aaf73e9581a0739c9a49dbd737052e211dce00e1c439a1c813d871ea82