how weak of mind people who use straps are and how big a wusses they are.
You've taken this way out of context... and your extreme deffensiveness is humorously telling.

Please keep going.
I'm gonna requote my last statement because it is at the route of everything.
Duncan,
Consider your own contrapositive.
You are suggesting that the grip strength is stronger than that of the mind. Could we say this is 'utterly false'?
Consider that your mind (not just what you think you can do... that's just where the chemical cassades progagate from) controls everything.
You know in Thai land, many people without legs who need wheelchairs do not have them. They literally crawl on the ground.
Now consider the 'wheelchair' equal to the 'strapps'
Obviously, one of the two people has a much harder life. Which of the two will have the stronger mind?
As long as I still have my own hands, I'll let me grip fail first. I'll keep working on that. I'm not calling anybody a wuss for real. A lot of people need to think about what they do though.