I don't think Bill Gates has ever said anything particularly intelligent, and he certainly does not strike me as unusually intelligent in the sense of having a deep, granular command of complicated subjects.
Gates got insanely rich because he ended up controlling the operating system layer of the mass market personal computer industry at exactly the right historical moment. Specifically, Microsoft got the IBM operating system contract and, crucially, also got the right to license the operating system to other computer manufacturers. So Gates got strategically lucky, or, if we are being charitable, showed very good strategic foresight. But none of that is evidence of some extraordinary or brilliant mind.
When I talked to Gates in person, he said “experts tell me a long range electric semi truck is impossible”.
However, when I asked what his assumptions were about battery energy density and vehicle energy consumption per mile, which are the two numbers needed to determine range, he did not know either number!
I also offered to let him take one of our semi trucks for independent testing, but he declined. Not sure what more I could have done. 🤷♂️