Totally agreed. Also feel this feeling of "moral superiority" is at play even when the complainers are not in a position to exert any power -- otherwise worthless people throwing mud just to feel worthy. That probably counts as practice for when they can get the upper hand.
A point i didn't see mentioned is that the talk about "having the balls" is all about the fear-of-monads being overblown and unjustified, and in this context making unfunny jokes about overblown and unjustified bravado conveys a point -- and does so in a way that no amount of explaining that "it's not so bad really" would. I actually think saying he was being exclusionary in this instance is downright bad faith.
Not exactly answering the question, but: Many times "You're so arrogant!" is just a way to stop an argument. It is a way to derail the topic into some unmeasurable subjective trait. And some times the part doing the accusation is the one who does not want to negotiate.
Regarding (3) -- To grasp someone else's approach or point of view is inherently difficult. Thus we are all arrogant by default.
Even though every person has their own way of expressing this, i believe in this sense arrogance is pretty much a given, and overcoming it to some level (which is never completely) is the challenge. In other words, you don't become arrogant, you're born this way, but you can change.
To listen is something you can learn. You can practice. It might not seem so at first sight.
I'm serious. In dancing your bodily similarities and dissimilarities to your partner are in your face all the time, the fitting of them is (in a way) all there is to dancing. You both have to be aware of it and not fight it, you have to work with it. You have to learn to let the differences flow (so it is not enough to learn the choreography, you need to be able to enjoy the dance).
Be that as it might, that is not Dawkins' idea (i believe the foremost thinker in that regard is W. D. Hamilton), what Dawkins did was just giving it the catchy name.
I think the whole issue is that Facebook prioritizes the "addictive" nature of the feed. That is, their number 1 metric is clicking, so they have a very very narrow idea of what "engagement" means. But, as far as i see it, that is unavoidable...
