Mostly because Blizzard would screw it up, but it would give the game the shot in the arm it needs.
Is what you would say if you don't actually put any thought into how it would realistically work without angering the current playerbase or comtinuing to let the game be incredibly unfriendly to any potential console playerbase.
Playing on a controller as is is super unintuitive as is, as a non insignificant portion of classes are very much built around tab targeted gameplay. Trying to play destro warlock using console port feels awful.
Combine that with the fact that end game content like raids and M+ will be inaccessible for the vast majority of the playerbase because of the above and that no shortage of PC players won't want anything to do with console players, because of the above.
So either console players get screwed out of content and discriminated against by the PC playerbase and get discouraged from playing the game or you make seperate servers for console and PC where very few people will be playing the end game or there's no community and console players get discouraged from playing.
You could rebalance the game and its gameplay to be more suited to controller play, which would involve fundamentally redesigning the way many classes play and then upset your core playerbase, many of which are already unhappy with recent GCD changes among other things.
The amount of work and risk involved actually bringing WoW to console would not be worth the investment and Blizzard has more to lose doing so than they have to gain.
People bring up FF14 as some sort of counter argument to bringing wow to console, while not realizing that the game and its classes/gameplay/content were built from the ground up to support console and controller play and that adding crossbars to WoW doesn't solve the many other real issues of actually bringing the game over.
If or when theres a WoW2 in another 10 or 15 years and its a consideration from inception is the only time I ever see WoW being on consoles.
The game being poorly optimized also doesn't help. My computer isn't far off from any next gen console and still has huge frame drops below 30, sometimes to single digits when spells from 30+ people start getting thrown around in a raid or at a world boss or in PvP
And the game doesn't really need a shot in the arm beyond Blizzard just giving players what they want rather than what they don't, which Shadowlands seems to be doing incredibly well. What makes or breaks an expansion is how much they bother to listen to the players.