But how do you change hearts? Aye, there's the rub...
(I think the quote is too pessimistic, but not wrong. For each of us, there are areas in which we are open to logical argument, and areas in which we are not. For those where we are not, we need heart change before we will listen - really listen - to the arguments that should convince us.)
Logic is a way of establishing credibility, but if it's not enough, then your argument can be rejected. I can quote you papers that say ivermectin is effective against COVID, but you would likely reject that despite whatever logic because more credible people (and papers) say otherwise.
Emotion - if someone refuses to believe something, they won't. That's why it matters so much how you say it. If you're insulting someone when arguing, you'll never win.
If you can learn how a given person's logic works, you can generally feed them the inputs necessary to produce the desired outputs. Some may find this immoral, and they may well be right in certain value systems, but they are also needlessly hamstringing themselves to bask in self-congratulatory failure while their opponents likely have no similar scruples. It's utilitarian, to be sure, but I'd happily mislead people to prevent genocide, just as some readily mislead the public to cause genocide.
A shortcut for working this angle, especially en masse as we see in political debate, is taking advantage of the many identified cognitive biases.