Let's say the media finds 10 things Trump is right about and 2 things he is wrong about. The entire focus of the hype will be on the 2 and will ignore the 10.
That's because they expect, especially once someone becomes president, and the world is listening to his every word, that nearly 100% of what he says has been fact-checked, verified, gone over, and gone over again.
The 16 words that George W. Bush spoke at the 2002 state of the union about Iraq trying to get uranium from Africa is an example of something George Tenet took the blame for it not being up to presidential standards of being true.
So if Trump is getting 20% of what he says wrong, somebody isn't doing their job.