Objective reality is complex and hard to explain or list all the facts in a single argument session. People are also good at cherry picking the facts they agree with and disregarding other related facts. As others wrote, there are also bunch of trade offs, not many subjects have clear and low amount of facts that everyone can agree upon. People tend to argue most about society rather than theoretical math or physics. Like you can argue about what is the perfect form of government but you also have to account for the people who are part of the governing and being governed, they are not ideal actors, so the practical reality isn't straightforward.

Coming back, what is objective reality, anyway? Each person perceives the reality differently. And if you go down to measure single basic part of the reality you will find out the act of measurement already changes the outcome. Or we can agree about the final, ideal state but not how to get there.