For instance, the part "next time someone says you have a weird hobby", why does the reader supposedly care if someone does say that to them?, and why do they need to remember anything when that happens? What is this memory bolstering them against?

Is it meant to keep their heads from getting too big from the compliment?

In fact I consider weird a virtue, and when someone calls me weird, I usually say "thank you" whether they meant it as a compliment or not, but in fact most people do not intend that charge as a compliment, and this comment in parficular can be trivially unpacked and can not be interpreted as either a compliment or even neutral, without ignoring the actual words and context. It doesn't hold together as a rational string of words any other way than as ridicule.

And I decline to believe that you don't know that, which makes this comment disingenuous.