Nice sales videos.
The last class I had with Ken Hackathorn was BEFORE he was a spokesman for Crimsontrace, hence not on their payroll. You are right. He is a fan of lasers. He thought they were great for inexperienced shooters, those who didn't know how to use their regular sites, had significant vision issues, etc.
Those real experts may be real experts, but they are also being sales people. If you have followed their careers, you will see where they highly promote products from whatever company for whom they are working.