I've had 7 surgeries under GA. Personally I find it extremely difficult to put myself in a position where I am unconscious and naked in a room full of strangers, who could do literally anything they choose to me and I would have no idea about it. That's a terrifying prospect for me. The one reason I can go through with it each time is that all of those involved are held to very high professional standards, and one would hope that they would not dare to act inappropriately in front of other professionals.
For me, this is the issue here. Aside from the utter narcissism of doing this to someone's body (isn't it enough that you can save a life, why the need for this additional power trip?), my main issue is the fact that some professionals are doing completely unnecessary things to someone's body while they're unconscious, and not a single member of staff in attendance spoke out about it. This gives people like this confidence to continue and perhaps escalate such behaviour. When you have surgery you consent to very specific things only, and perhaps agree to other things potentially being done if it's necessary to save your life which under anaesthetic. Surgeons should not be doing ANYTHING whatsoever to which the patient has not consented otherwise where does it end? This needs to be acted on strongly and decisively.