Yet - as we know - what is taught in science today may well be found to be erroneous tomorrow. Why put so much reliance on ideas and 'truths' when your suggestion that "the field of human endeavour with more testable, shareable, self-policing, self-correcting rigour and more proven success than any other" has been shown to be so unreliable over the last 50 years?
Firstly, that science revises and corrects itself in the light of new data is possibly its single greatest strength. Of what else can you say that? Definitely not religion, that's for sure since there are few if any data, new or otherwise, to work with. Being able to self-correct when new data come along is one of the hallmarks of rationality.
Massive Kuhnian paradigm shifts are also incredibly rare. Typically science is a cumulative process, where knowledge is additive. Contrary to popular belief Einsteinian physics a hundred years ago didn't show classical physics to be "wrong": it demonstrated it to be incomplete (which is a different animal altogether) in situations of enormous mass and very high velocities.
Secondly, there's no other method we have - absolutely nne whatsoever - which is even remotely as accurate and successful at sorting out what's true. That's why.
ETA: I see JeremyP has asked has some of the pertinent questions and made some of the pertinent points I was going to.