akuperma
A few points
“If you get rid of that, one can easily make bread, pizza, etc. for Pesach.”
Nu? there is nothing wrong with making bread or pizza on Pesach. There is something wrong with having Chametz. We just read about all the different styles of Korbon Mincha brought, including a variety of breads none of which wer chametz, LEchem hapanim arent chametz, etc etc
“where is the logic in object to corn”
As explained on the other thread. IT isnt based on logic. Minhagim are based on mesora. where is the logic to ban corn/rice if cooked within 18 minutes (we eat wheat which can become chametz when baked withing 18 minutes). IF the concern is the appearance why not ban matzah meal?
“Allow corn, and not all that much will be banned…”
that isnt a bad thing per se. And many Sefardim do that, Chazal did that as well. I dotn know if they Pizza (they had bread obviously though not chametz) and their Pesach wasnt/isnt less special than ours.
however our minhag is not to allow corn, so we dont. We dont have a minhag regarding Quinoa so there is no reason to start one.