CDPR would want as many people as much possible to buy their game. This is one of those mainstream games that is marketed for general audiences. I doubt they make the difficulty so punishing that less experienced people who don't play a lot of games would go and rage quit. I expect the difficulty level same as Witcher 3, GTAV and Assassin's Creed series.

I would love a dynamic difficulty setting like Resident Evil 4 though :D