In high school more than likely they had a few receivers that were awesome that made it look pretty easy for them. However, in college you have to identify coverage, make the right read, get the ball out, and put it in the right spot much, much faster than you must in high school. The margin for error is much slimmer in the college game. All defenses in college know how to scout you and try to take away your strengths. Defenses are much more complicated and you won't have the type of matchups you would like on every play.