“Just because they wrote about techeiles being reinstituted does not mean that we nowadays have a basis anymore to do so.”
I never claimed that this gives us the right to reinstitute anything. All I am proving from here is that they obviously felt that we could have Techeiles despite all your claims about mesorah. It’s not like you just discovered the concept of mesorah and when the rishonim and acharonim wrote about this there was no such issue.
My point was that there is no raya from these rishonim that we absolutely can. I never claimed that mesorah makes it impossible to have by definition, just that it could be depending on what your mesora is, etc. So what you’re saying is at best semantics, because yo still have no raya from these rishonim.