Those lyrics are apt for many people here, who appear to be incapable of changing their minds in light of new evidence.
Yes, it is difficult to change one's long, hard, held beliefs, but Ive done it before. If you look at some of my posts from 5 or 10 years ago, you'll find I've changed my mind about many things.
Me too, and I'm proud of it.
I am emphatically not talking about anyone in this thread, and I don't have anyone in mind when I say the following. Like you, I've noticed how very resistant the majority of people are to changing their mind when new evidence comes along. The whole of science works on that principle, but I don't think people with science-based careers - such as most people in this forum - are much different from anyone else.
I think it's because a person's opinions and beliefs are a fundamental part of their identity, so letting go of an opinion or belief is like letting go of a part of who you are. No wonder it's difficult.
Furthermore, there is the matter of right and wrong, ego, and self-esteem. If you change your position on some long-held belief, that is like admitting you were wrong all that time. Having to admit that you were wrong about something is really tough on the ego, even when it comes to opinions, where right and wrong don't really apply. It goes without saying that we want our beliefs and opinions to be "right", otherwise why would we hold them?
Admitting you were wrong, and letting go of part of your identity..... it's difficult; very difficult. But we must, surely, because we are scientific people, are we not?
And yet, Max Planck observed about scientists: "Science proceeds one funeral at a time". This is what he wrote in his autobiography:
“A new scientific truth does not triumph by convincing its opponents and making them see the light, but rather because its opponents eventually die, and a new generation grows up that is familiar with it.”
Clearly even the strongest advocates of the scientific method struggle to change their minds. But that doesn't mean we shouldn't try.