I suspect that the ease of gaining an advantage is just a way to reduce rng. The current system of gaining an advantage such as attack from behind or high terrain is quite easy for the average player to understand.
Due to the fact that Larian targets a fairly wide range of players, RNG reduction makes sense, although you can argue whether it is the best solution (not too much in my opinion).
It’s odd to me that developers still see gamers as clueless individuals who have no ability to grasp different combat systems.
Video games aren’t a new field. They’ve been around for almost half a century now and is mainstream. Gamers have become much more sophisticated and to think the average gamer can’t figure out basic 5e mechanics seems a bit insulting.
But I guess that’s the price of building a AAA game. You have to cater to the lowest common denominator.
You have too much faith in people

I have been playing WoW for years and all this time I have met a lot of people who, although they have lost hundreds (or thousands) of hours in the game, still have problems with the basic mechanics.
WoW has never been a very complicated game.
The extreme case was someone who has been playing for over 5 years.
I think no one would perceive players like that if in fact a fairly large part didn't act like that.