This makes sense in a company with limited. Apple can obviously
both care about customer UX and have a good development documentation, have a good public bug tracker, pay out bug bounties, etc.
If they hire 20 people for this and give them a few offices in their precious mothership, it won't affect customer UX in the slightest. They may continue to give it the top-most priority, which is the right choice to make.
That's why it's unclear to me. Apple's valuation is a poor argument. It could have been even higher, since there are areas where Apple is failing precisely thanks to poor developer relations. E.g. serious gaming on Macs/Apple TV, even though the hardware is amazing.