Would you have given consent if the doc said he could use no form of anesthetic during the procedure, and you would be fully awake and remember the whole thing? I am sure some would go ahead anyways, but how would that difference affect your decision to go ahead? How would it affect, say, a liver transplant go decision, or a lung transplant?

Consent is much easier to give when you know you won't be there for the experience. Consent is also irrelevant to my argument, as the comparison is of the event, not the outcome.