Waymo is the way to go. There is no driver, no tips. It is now in most of Phoenix and growing, but so far, it is only in Phoenix, LA, San Fran and Austin. I would love to have it come to Montreal and Toronto. It is partnering with Uber.
I am the one who has never tipped an escort or another sensual service for decades. It is silly to tip a professional service; I consider them to be.