If I thought Psychology Today published articles like this one all the time, I would subscribe in a heartbeat. I really couldn't agree more with the general tenor of the argument. Kids, I believe, cannot learn unless given the possibility of failure, with its accompanying pain.
I've been constantly amazed as a new parent with all the "safety" items which are now considered mandatory (either legally or socially) which did not exist when I was a child. Undoubtedly some are good, and with an infant you do have to be quite careful to prevent serious harm, but I have to think that all the insulation from pain has to have negative developmental results, as the article would suggest.