I would expect a designer to know just enough to design for the web but shouldn't go full blown into what is absolute and relative,how to get to get a container

I would expect a designer to know just enough to design for the web but shouldn't go full blown into what is absolute and relative,how to get to get a container to stretch with floating divs inside, what a variable is, or an if else statement. People really should stick to what they are good at and stop being jack of all trades. There are way too many people claiming to be deselopers out there and I have only seen a handful that are decent.