Its lumped right in with politics, religion etc.
There will be no end to the argument. This is what happens when you dont have factual evidence that will holistically remove emotion and human bias.
There is factual evidence. It's just not in the US. It's been studied to death, in Canada, Britain, Scandinavia, Australia, New Zealand, etc. All those various countries agree.
There will never be an objective study in the US. There are many reasons for this. As you have noted, there is a whole history of bias, going back many decades. It's a revenue stream that many find addictive. It bucks our culture in the US, in many ways. Some entrenched beliefs, even when exposed as propaganda, don't go away. Then, there is the other side, which riles you, and which you constantly expose. The people who want it to go away, no matter what, or how good the reason.
All in all, it is the most polarizing subject...up there with religion, warfare, abortion, taxes, and all the many touchy subjects that cause fractures in our societies. I try to stay out of the thick of it. I had the absolute most hateful diatribes aimed at me, and I am not talking about in here, when the subject came up politically in my home state. Fantastic conjectures which had no tangents to the real world. Misinformation flew like I had not previously thought possible.