I agree that it should be just as easy to suspend your account as it was to sign up, but irretrievable deletion should be harder.

Companies ideally want to stop fraud at both ends, but I would be more upset if, for example, my Airbnb account were fraudulently deleted than if someone fraudulently made one in my name.

Granted, deletion requires access to the account in question, so maybe that's enough of a hurdle already? In that sense it's already harder to delete than create.