Maybe it's good to assume that but at this point that is not going to purposely happen at a company like Google or Amazon. The risk, which is a near certainty to bear out if they have any decent employees among the tens of thousands (esp. with the weekly "I'm leaving because I hate this company" screeds these companies yield), isn't worth whatever little reward they might find in your data.

In this case, usually the infrastructure provider owns the keys, and if not, they would have easy access to them. So I don't see how encrypted disk really solves anything besides accidental leakage to a peer infra user, or someone sneaking into the datacenter and physically removing the disks.

Maybe if you are like a high profile target of a state actor, but otherwise this is a paranoid take

Proof for this claim?