That would be nice, but I think most people would be hard pressed to find anyone who has the necessary skill set to run a business right out of high school.  Yes, there may be a few, but those are the very lucky and the very skilled.  For the average individual going to college is a great, relatively simple way to start down the road towards whatever they want to do and help them learn the skills necessary to do it.
Also, what high school graduate has the capital to make such a huge investment?  And even if they do, what percentage of businesses actually succeed?  If i remember correctly it is at least less than 20%, if not less.  It is also very incorrect to say that everyone has a college degree considering 28% (U.S.) of the population has a bachelors degree.  This number may be on the rise but that is definitely not a large percentage and even if it were, it is hard to deny that the average individual with a college degree is much more comfortable compared to someone who doesn't (workers 18 and over with a bachelor’s degree earn an
        average of $51,206 a year, while those with a high school diploma earn
        $27,915. Workers with an advanced degree make an average of $74,602, and
        those without a high school diploma average $18,734).
College is a very positive thing in nearly all respects.  It may not be for everyone, but that does not discount the positives that it has to offer.