The main point I had in mind is that social receptivity is something of an exhaustible resource for introverts, something of which the book contains a number of illustrative examples. When an introvert spends time in active socialization, they're using up the mental resources to do so with other people in the future, at least without taking a toll on their psychological, and in extreme cases physical, health.
If you suggested that given the value of socialization, people should spend more time stopping strangers in the street to hold conversations with them, and I objected that for both participants this is draining the resource of time, and that it will often not be a high value use of that resource, I suspect that you'd accept this as a reasonable objection. For introverts, social interactions such as these contain a similar resource tradeoff.
On another note, if feelings don't have much worth in decisions, what does? What else would you want any kind of success for?
If you suggested that given the value of socialization, people should spend more time stopping strangers in the street to hold conversations with them
To be clear, I didn't intend to suggest this at all. I was responding to the situation where you want to approach but then you think vaguely that their feelings may be disturbed by this. I'm not suggesting introverts stop strangers in the streets to talk to them, just that if people (introverted or extraverted) have already formed the intent to approach a person then they shouldn't allow it to be derailed ...
r/Fitness does a weekly "Moronic Monday", a judgment-free thread where people can ask questions that they would ordinarily feel embarrassed for not knowing the answer to. I thought this seemed like a useful thing to have here - after all, the concepts discussed on LessWrong are probably at least a little harder to grasp than those of weightlifting. Plus, I have a few stupid questions of my own, so it doesn't seem unreasonable that other people might as well.