It’s a safe route. I did the same when I wired our Tesla a couple of years ago - fed 100amp circuit to the charger which is hard wired for future charging of multiple cars on the side of the house. In the garage though I just wired the circuits for 50amp as the garage feed is only 80amps and we don’t charge both cars in the garage at the same time.I'm going to take your advice and run the 100amp cable, 50amp breaker and 14-50 outlet. This will get me up and running and I can hardwire for the 19.2 charger or if we get another EV then I charge them both at once on 50amp breakers. This is a fluid situation; probably change my mind again by the end of the day. Just wish guy at the dealership was more versed on this but we're both learning.
Once we are able to replace the Tesla with another EV SUV that outside 100amp may come in handy!