Fakemaven: Bringing proofs from the maharil’s definition of the word nignaz and general statements about the concept of “safek d’oraisa l’chumra” are lomdus points, not l’maaseh. The only l’maasehdik argument you have for the techeiles is to bring the actual poskim who were matir it, and they are few and far between as you know.
If we were debating something about electricity on Shabbos, bringing proofs from Reb Moshe and the Chazon Ish, and then you came in bringing your interpretation of a Rashi contradicting all shittas, would you really expect to be taken seriously? This is a contemporary issue and it needs to be decided by contemporary poskim who know the sources better than we do.