That's the thing though, the legal limit for operating a car is not that high. It shouldn't be either. Alcohol slows response time significantly after just a few drinks. We're not talking minutes, but seconds, and fractions of a second. Those seconds and fractions of a second can make all the difference when you're careening down a freeway. The point where that happens to you, the point where the legal limit to operate a motor vehicle kicks in, happens waaaaaaay before you've had enough to black out, to literally not remember what you did. Getting black-out drunk puts you waaaaay over the legal limit.
Now this is why I reacted so sharply. I had sex where I was too drunk to drive a car, where my response time was dulled, but I was very very far away from a black-out, and I didn't have a hangover the next day either. I got moderately drunk, smoked a little weed, and then had a fantastic time with a beautiful woman and I don't regret one second of it. Consent 100% intact.