There cannot be rigorous arguments in that sort of subject.
Called it.
Maintaining your belief requires you to preemptively deny the possibility of being wrong, just like any other religion.
Quite the contrary. Believing that your belief is certain and objective, rather than just probable and subjective, is the mark of religion.
There can't be rigorous arguments in economics or other "soft sciences". It is pointless to debate if we start disagreeing right there...
(Haven't you never read priests, politicians, and assorted pundits "prove rigorously" all sort of weird and contradictory ideas, from creationism to communism to why gun control is good/bad and beyond? Why do you think that those sciences are called "soft"?)