I don't think this is true. I have worked with people who don't know enough going down the stack of web programming (and been one of them). They couldn't fix

I don't think this is true. I have worked with people who don't know enough going down the stack of web programming (and been one of them). They couldn't fix bugs as easily as I could. I'm sure there are other consequences, probably design related, but the bug one is apparent to me because I help when I can.