Can he turn Apple into a computer company that would focus on replaceable, modular electronics? Something like Fairphone, but on a bigger scale and with more resources, or that could have more runway without turning a profit? No, he can't. Apple is known for being a company that wants to integrate everything and needs to control all of its process. And for all the environmental talk, they would never sacrifice their bottom line to ensure their products are really green.
Could he turn Apple into an online education platform that leverage open source platforms and open hardware to make it as affordable as possible to everyone? No, he can't. Apple depends on the brand of exclusivity and premium products.
Need I go on?