That's an interesting viewpoint. It would be right to say that all ideas are not false facts. Some are views we hold in common with almost everyone else. So we might agree on what we are all entitled to as human beings irrespective of our nationality, race, gender, gender identity, religion, sexual orientation, citizenship, or another status - human rights as a shorthand.
We need to understand how the majority have come to that consensus. We haven't been able to look at human rights and say - see, there are human rights, they are a truth, they exist. But we do generally agree this idea is not a false fact, neither, though, is it a personal opinion, such as not liking vegetables.
We come to agreements about what is right and good by discussing the subject but this agreement depends on one thing more than the ability to argue, empathise or dealing with difficult truths. Agreement relies on truth.
We have seen so much dishonesty in politics which has spilt over to the way people debate on forums. I think the answer to why so many want actual facts to even start the negotiation that is a discussion is because they have seen the use of so many lies and deceptions.
Why do people lie and dissemble? It seems to be simply to win. We have seen our country get into the hands of those who want to win at all costs. Why? What will they do with that win? They don't know. That is not what they have thought about; they only thought about winning. David Cameron didn't know what to do with power and walked away when it got difficult and Johnson has no idea how to deal with an emergency such as Covid. That is not what they were in it for. They were in it to win; that was the end game.
In the same way, many on here told others "we won, shut up". That was all that mattered. No policies; no aims for the common good; just winning.
I think a slight obsession with provable facts is no surprise when faced with people who only want to be winners; who don't appear to care about the others or have any policies to deal with future needs.
One recent example is education. How can you "level up" without it? How can you "build back better" if you don't invest in our future? The words and slogans won the race but now they have nothing. Their lies have put us in a place where the normal human instinct for community and for working to a common end is dying under the foot of those for whom winning is their final aim - after that, they have nothing to offer and the world will become very averse to lies and liars and, not unreasonably, we crave facts.