At the danger of losing my shill cred, originally, Iger wanted *a lot* of content on D+ to compete with other streamers and to replace the cable box which spews out a huge amount of content. Quality wasn't job one.
But now, with Wall Street now hating almost all content creation, he's pivoting to less content but, hopefully, higher quality. All the other content creators are trying to do the same thing so that they don't all bankrupt themselves competing with one another for who can produce the most content.
Interestlingly, when the time came for Disney to pivot from number of subs goosed by a deluge of content, Chapek was doubling down on content spending and ignoring Wall Street warnings. This is partly what prompted Christine M. to run to the Board regarding Chapek (and also Chapek was getting too cozy with Peltz).