Good questions, anon. Keep thinking.
This isn't a complete answer but is a thought: Trump is not God. He doesn't know everything, and relies on advisors for the majority of the data that goes into his decisions, like any other world leader. 5G for example, his business mind likely just sees "fast communications infrastructure = good for business, therefore 5G = good." Nobody really knows the long-term effects of the radio waves and probably won't for another generation.