I said the spreads are to get suckers like us to bet more!
The casinos always get their %, unless things go terribly awry -- they don't care who wins and loses as long as they can move their money off on other casinos and cover their profit margins.
It's kind of like their way of managing exit traffic, if you think about it. Someone I know has a sportsbook in the Caribbean and used to own a casino on Antigua before they all got the boot, we had an interesting talk about how those lines and the book covers on them earlier this year.
And I agree, having half points on all the spreads sucks.