They own or completely control their entire supply chain

Uh? They have OK integration and supply managemnt, but they're a very far cry from controlling their entire supply chain. If it were Samsung then yes, they do pretty literally everything under the sun (and more, they have a logistics and transportation arm, I think the only thing they don't have is mining operations).

can undercut every competitor as well as invest 10x as much as anyone else to beat the competitors.

And yet they don't, they're usually undercut and the usual complaint about Apple is that their products are overpriced for what they are…