No, he should listen to some of the best coaches in pro football who have all looked at his talents and found them wanting.
History is filled with successful people who ignored the naysayers who told them to give it up........
There is an old joke about the guy who stays in his house during a flood. The water is rising and a four wheel drive and a boat and a helicopter in turn come to help him. He turns them all down, telling them that God will provide. Well he drowns and winds up face to face with God and asks "What happened?" God replies, "I sent you a truck and a boat and a helicopter. What more did you want?" Well God sent Tebow the Broncos, the Jets, and the Patriots and he's still out of football. Maybe God was sending him a message? And maybe he's tempting fate by not realizing that he just isn't cut out for pro ball?
I think Tebow is OK with God.........