I respect you immensely and don’t want to say anything that seems disrespectful or is meant to be irritating.
Watching Ken’s shooting videos in the past year, he’s not shooting that great. Especially at speed.
He will often miss shots but the slow motion shows excellent trigger presses and mechanics as you would expect.
Which suggests that the limiting factor is vision.
He wears glasses and is of the age where vision and focus can get difficult.
Many competition shooters experience this decrement, only to have immediate restoration of vision and accuracy of hits with red dots.
So that’s my assessment. If Ken wants to shoot better (basically to his mechanical potential), he “needs” a red dot.