Forgive me if I'm being dense, but I'm not certain what that has to do with the point being made. Could you explain it in greater detail?
My understanding is that there are entire classes of programs where "let's put it on a website" is not a viable method. You can write many types of apps that way, certainly, but you pretty much give up anything so much as pretending to be performance. Additionally, it prevents you from doing anything particularly low-level - if you were desperate enough, you could always set up a web interface to gcc or something, but that won't help you if you want to hack on a device driver or something. Systems programmers are people too, you know. ;)