Driving feels different than being driven. The illusion of free will is a necessary one; we need to feel in control, to have agency over our own bodies and minds. I can't really imagine otherwise, I can't remember a day when I've not had this feeling, so it's impossible for me to comment on what it would be like without this deep rooted sense of control. But this is why I agree that the discussion about free will is interesting in science, but useless in everyday live.

Also we fear what we can't see and our subconscious is forever hidden. I believe these are the main reasons why most just can't accept that free will doen't really exist. I've had friends who had "black-outs" after a drinking night and were so drunk they started doing things they'd never normally do. That was all good fun, but I always stayed worried about the part where they said the next morning that they remembered nothing. One of them ran full speed into a three foot high climbing rack for children on a playground and woke up with his entire stomach black and blue, very painful... But he didn't know who did that to him. He didn't remember he did that to himself. But during the "accident" he acted drunk, but was acting by himself. I guess it's scary for some people to know that they are capable to do things that they don't think they're capable to do, because "it's just not like them". We fear losing control of ourself. We need to feel in control of ourself and our actions and our choices.

My two cents on the whole unnecessary debate on free will. And free will isn't the only thing evolution deemed necessary for us to be fooled about :-) Like that Melvin isn't a big deal... Well, he is and besides, he's right too ;-)