First I had a more than one passenger tell me during my time driving that prior to Uber they would regularly drive home after drinking from parties because they just couldn't get a cab in areas they were often in.
Second, driving drunk people is the absolute worst. Even if they don't puke in your car they are a pain to deal with[1], and less considerate of your vehicle in general. Having to deal with them one too many times was what lead me to stop driving at together. I initially found driving to be a fun way to interact with random people I wouldn't normally meet but the drunks killed it for me.
[1] During the few weekends I did it I had one drunk guy puke in my car second ride of the evening. Another belligerently refuse to tell me their location when the GPS showed them in a spot that was not near any road and become verbally abusive when I couldn't find them. Another stash a half open can of beer in the back seat pocket spilling beer all over the car. Uber pays for cleaning but they don't pay for lost income stemming for your car being out of commission until you can get it cleaned. I couldn't imagine having to rely on driving for any significant portion of my income under those working conditions.