No hard feelings, I'm in agreement with you. If you want to know times lap, timers are best choice. When comparing times to other riders or are interested in continuously improving lap to lap and session to session there is no other choice. With that being said, I think the gopro/camera is a better learning tool for beginners. It allows you to review lines, body position, specific incidents, and other riders good/bad habits. The video will help develop and enforce good habits, where knowing only times may push you to improve while becoming accustom to bad habits.