General Gambling Questions For Me

[BluffTHIS!]

1) If a gambler spent the necessary time to become a very good handicapper in one or more sports, as in basically full time, BUT did not also throughout the day constantly monitor the opening lines or movements in same either online or in a B&M sportsbook, could he still beat sports? That is, if he got up late, checked the lines only twice a day and either bet them or not at those limited times, would that be sufficient?

2) What general type of heuristic do even excellent professional handicappers make insufficient use of?