Driving and playing an instrument are a very different things. It's quite possible that some people after a few drinks may actually "drive better" in an aesthetic sense - more smoothly and decisively and so forth - but they also drive more dangerously, and that is what matters when it come to driving, not whether it looks pretty and maybe gets you there quicker.

Fortunately musical instruments aren't lethal in the same way. Different considerations apply when it comes to "dangerous playing".