Re: "a bad workman blames his tools"
Using a hammer on screws doesn't make the hammer a bad tool. Just the wrong tool for driving screws.
But a hammer *does* work good for *setting* screws; getting them to stay in place in the wood so you can *then* use the correct screwdriver (this is usually when you don't have pre-drilled holes). Mind you, the correct screwdriver is key too; that Phillips is going to be crap for driving that slotted screw.