Or it is for styles of games that suit it, like 4X games or wargames (well, if people still make those). Situations where it's not due to you not being a l337 m3nt4t rather than just far too much stuff going on, so if it's real time you'll slow the pace down so much that it might as well be turn based.
BRD is the most boring slog they ever made, fitting the most boring slog of a raid is in there too The more recent dungeons are a lot better than old ones I find, fights actually have some sort of mechanics now (that the player base still outsources thinking to mods to deal with)