I think this is an ignorant tweet, looking for reaction. I disagree with it like many. Nascar drivers are VERY good, VERY versatile. Not the most versatile in the world. If your good, you have to be versatile, doesn’t matter if you race, nascar/Indy/Sportscar/f1/karting.
NASCAR drivers are the most versatile professional racing drivers in the world. More surfaces, racing styles, track types, than any series.
F1 driver is a true specialist-focused on singular style of racing, while a modern Cup Series driver must be a jack of all trades. Discuss