MichaelW

Then why do people have "clipless moments"

I have tipped or slipped over a few times using lose straps and my feet have hit the ground every time.
Touring is not about the ultimate in efficiency, but a comfortable compromise that allows you to get on touring. Hiking shoes have soles that are stiff enough to be useful on the pedals and are comfortable and tough off the bike as well.
For newbie and occasional tourists, clips and loose straps are fine.
For expedition riders, clips and straps have good failure modes, clipless can fail in several ways that make pedalling very difficult.
For performance-oriented tourists, racing folk and existing clipless users, they tend to use what they already like and know.