Those numbers are just for white voters, the numbers for all voters are here:https://en.wikipedia.org/wiki/United_States_presidential_election,_2016#Voter_demographics
so you take a random trump supporter arguing with a random hillary supporter, the trump supporter is probably an uneducated idiot and the hillary supporter is probably smarter and more educated.
Remember, we're talking about a fairly even split here (49%-45%). Sure there's a 4% higher chance that someone with a college degree will be a clinton supporter than a trump supporter, but in practice pick two people with college degrees and you'll most likely get a clinton and a trump, with a possible gary johnson thrown in every now and then.
The same goes for other education levels as well. People without college degrees were split 51%-45% in trumps favor, which is only a 6% gap.