I think it's just the truth. I do agree that we should work to reach as many people we can, & to be as kind & genuine in the process as possible. Had things played out differently in my own life I might very well have been one of the people I am talking about.
Unfortunately, humans are very dangerous animals with a long history of killing people who make them uncomfortable. And critical ideas cannot be meaningfully communicated in a way that will prevent the discomfort of one's own realizations. Some people will actively work to avoid those realizations.
If there are people who simply will not engage with the ideas themselves, then it's probably important to be able to recognize those with "the ears to hear" apart from the deaf & willfully ignorant.
I'm not saying there is absolutely no way to break through, but we are finite, time & energy are limited. I think if we are going to be effective, we have to clearly identify & acknowledge all of the mental blocks/conditions we are up against.