Hi oomis.
What does “Even the OU accepted…” mean? Yes the OU accepted it. That doesn’t mean every Possek says it’s ok.
I also don’t understand your “frustration” with the chumros of Ashkenazic Rabbanim. Do you think your string of exclamation marks will make them understand something they missed regarding chameishes minei dagan?
Pesach is not the only area where we follow the directions of our Chachamim, palatable or unpalatable as they may be. The issue of Chametz is one area in particular where many feel the need to be stringent (even though in other areas they would be more inclined to take a middle path or to be lenient.) Some people connect this to the fact that Chametz alludes to the Yetzer hara. I don’t pretend to understand that totally. I do know that any chumros accepted in the house my husband grew up in, are now part of my Pesach kitchen.
And if my husband liked quinoa, (which he does not) I’d call our Rav.