I don't get how you can get to that conclusion, even if it's true and Blizzard uses this approach they completely fail, the sentiment of the hardcore playerbase is a lot harsher towards WoW then that of the average player.
To elaborate on that, while you could say that mythic+ was a step in the direction of 'esportification' what it did at the same time was making dungeons more relevant over an expansion when it has been raid or die before that.
Legion also increased things you could do in the open world and kept that more relevant over the expansion with worldquests and emissaries.
Bfa and SL tried to expand on that foundation and implemented more endgame activities with island expeditions, warfronts and torghast.
Not really stuff that the "top 10%" is interested in or asked for, especially with blizzards habit to tie relevant player power for that group to it.