I agree with you. I have used them in a wet wash with some success and with black plastic to melt mountain snow in above freezing conditions. They are so commonly referenced as a means to obtain water in the desert, it really is misrepresented in many survival manuals! I think people should try them in a variety of conditions, under controlled circumstances to understand then better. Especially before packing a roll of plastic and large quantities of tubing around expecting to use it to procure water in the desert. They will surely burn off more water making it than they will ever receive in return. After being here in the desert most of my adult life, I just make sure I have plenty with me and know where to get more.
Thanks for sharing your article!!