It’s not purely talent that allows them to make this kind of stuff. Otherwise people outside of these agencies would be making this stuff too. It’s also the fact the CIA or any of the others can go to apple for example and get all of the information on how these chips are made and the firmware on them, then put the company under a gag order.
It is silly to assume the governments hackers are any better then a good hacker that doesn’t work for them. And you need to realise that their advantages come from legal power, resources, and lesser regulations on research.
Because a lot of silly conspiracy theories seem to stem from people believing that the government are somehow superior beings, when the only thing that makes them different from anyone else is power.