Part of the reason potential technical co-founders get so frosty is precisely that airstrike's list is pretty much what the ideas guys are looking for, plus as others have mentioned the "6. You will agree to put in a good 6 months work up front for no pay to create something while I get 50-80% of the equity more or less smiling and nodding."

Of course, there's good non-technical co-founders out there, too, but just as in the job market, the good candidates disappear but the bad ones circulate endlessly, resulting in every hiring managed seeing almost all bad candidates, it's the bad "ideas guys who want 80% equity while you do the work" who we all encounter.

Also, some people really are superstars. If you want work with them when they're already celebrities in the field, then sure, that's who you want to work with. Once you're in the celebrity sphere you can stop thinking of checkboxes.