I used to point this out to a founder of a former company. He'd reject out ideas and suggestions, then make jokes like "there's a reason engineers aren't CEOs!" I had to remind him of all the successful companies run by engineers.

The best tech startups I've worked for had technical CEOs or co-founders with engineering backgrounds ("best" meaning good to work for and most successful.) Worst were guys who thought they were going to somehow be the next Bill Gates just because he didn't graduate college, either.