I know... impossible to know everything, but it's like anything technical, if you understand the fundamentals of the technologies, frequencies, hardware, broadcast equipment, it all falls into place and you don't ask silly questions.
I'm guessing "I've been in the cellular industry for 20 years" means he's worked in the Electronics Department at Walmart for 20 years? That'd be the only explanation how someone would be so uneducated in the fundamentals.
Admittedly I've only been in the industry for 8 years, but I've found that most of the people "in the industry" (and by that I don't mean working at the T-Mobile store, lol) have a passion for it and take their job requirements and learn 10x what is required of them. That's how I've always been at least.