If you cut a $10 billion check, I think you can negotiate yourself to the front of the line. Also, we are talking about the UAE - $30 billion for energy is a significantly better investment than a large number of Softbank bets.
If I want enough solar panels and batteries to make my house off grid I can just write a check and the stuff shows up in a few weeks. But that doesn't scale upwards without limit. Eventually the limits on global supply kick in no matter how much you want it.