Iger has been saying for a while now that they're looking for 'partners' for ESPN(+).
The issue: Apple and Amazon have relatively unlimited cash reserves, and they're now spending huge loads of cash to stream sports on Apple+ and Prime to bolster those streaming services. This is something that Disney/ESPN, Comcast/NBC/Peacock, Viacom/CBS/Paramount, and Netflix cannot do.
So, Disney has to lock down either a big-bucks partner, or, a partnership with sports leagues so as not to have Apple and Amazon outbid them. If Disney doesn't do this, Apple and Amazon could literally kill off ESPN.
Iger/Disney learned this lesson when another company outbid them for the India Cricket league and then promptly lost a few million Indian subscribers.
According to the article, it seems that the NFL wants to unload its own minor web/streaming enterprise that's probably not profitable. And the NFL wants the most coverage, so, for them, ESPN is a comforting home. They have no idea how Apple or Amazon will treat them long term. Neither company screams "sports!!"
They do know that ESPN will treat them like the stars they see themselves as. They all saw how Disney enabled the NBA games during the pandemic lockdowns (for a price).
This shows the importance of branding. And the four letters: E S P N, carries a history and clout. Not to mention the name of its parent company as synonymous with family entertainment.