N0m
I reread the thread
In your first comment you wrote
“We don’t ever use bitul after we intentionally created an issur. דבר שיש לו מתירים”
You mixed up two things
As smiler pointed out (I missed his comment) “He meant אין מבטלין איסור לכתחילה”
(That said even if you had it right it still wouldnt ” suffice to eradicate every possible retort.” we can quibble on whther it is a case of ein mevatlin (unlike davar sheyesh lo matirin which it certainly isnt) though again it ptrobably wouldnt be batul for toehr reason, Kal kavua and davar shebeminyan)