Honestly, assuming that most 5e players really care about compliance with the rules is quite naive.
5e has gained so much popularity in relation to older editions that due to the simplicity that helped attract casual players (I bet they are the vast majority).
We are also talking about an edition which was supposed to be characterized by great freedom.

The game will sell to DnD fans (among those who actually play the games) only because it is located in the forgotten realms. As long as the game is good, it guarantees that most players will not care if the game is compliance with the rules.