It's a such a weird dumb pointless goal.
The noobiest players in D&D consistently go for some of the most complex classes, and pretty much never go for Fighter, so it serves no purpose there. Rangers, Druids, Bards, Sorcerers and the like attract infinitely more interest from new players.
There is an ageing beer-and-pretzels crowd who do like the simple Fighter, but like, what % of D&D players are they? 3%? 4%? Something like that.
The problem I think is that the designers themselves are stuck in a deeply Gen-X mindset on Fighters, and unable to escape, or to see that a more modern design would serve the bulk of their customers better.