It's like saying why should people use Windows if Bill Gates did not write every line of it himself.

What? It’s nothing like that, at all. I don’t know that Gates has claimed to have written even a single line of Windows code. I’m not asking for the perfect analogy, but the analogy has to have some tie to reality or it’s not an analogy at all. I’m only half-joking when I wonder if an AI wrote this comment.