Only if the employee is very good and sufficiently dedicated to stand up against decisions by the founder(s) which are bad for technical reasons. It's hard enough for us techies to hire people like that; for non-techies it's basically a lottery. And that's if they don't actively select for the wrong traits. It's likely they'll focus on people who talk the talk, do as they're told, or have a business background but have dabbled with some techy stuff, etc.

Not in my experience, an employee (non-cofounder) will never stand up to your dumb ideas like a co-founder will.