> It has not been shown conclusively that microwaves (or other non-ionizing electromagnetic radiation) have significant adverse biological effects at low levels. Some, but not all, studies suggest that long-term exposure may have a carcinogenic effect.

He might not be entirely wrong. They're still not going to sell any to the general public, though, especially if it is carcinogenic.

https://en.wikipedia.org/wiki/Microwave#Health_effects:~:tex...