Software is very easy to bloat, expand scope, and grow to do more than really needed, or just to release apps that are then forgotten about.

Hardware is naturally limited in scope due to manufacturing costs, and doesn't "grow" in the same way. You replace features and components rather than constantly add to them.

Apple needs someone to come in and aggressively cut scope in the software, removing features and products that are not needed. Pair it down to something manageable and sustainable.