Auto-runes, auto-masteries, auto-spells?

Why isn't there already an option to set default runes, masteries and spells based on what role you get in the teamfinder? That way people don't accidentally go in with the wrong set up. I've done it. Others have done it. Happens to me most often when there's multiple dodges and I forget to change my set up for the 6th time. inb4 just pay attention noob.