Why would you think Apple is capable of building rockets? They have essentially zero aerospace expertise and that type of engineering is not at all in their DNA. Sure, they have billions of dollars to burn so it's within the realm of possibility, but it would be a very inefficient use of their cash.
Sure... but SpaceEx is a company with laser engineering focus on essentially one goal for the last two decades, and they're only recently gaining traction on their ambitions, Apple would have an extremely steep curve to ascend before they could even hope to enter the "crash a bunch of rockets for research" phase. Apple just isn't built for this type of engineering.