I guess Zed Shaw suffers from nerd burnout. As in, a sort of more emotional burnout from having had to deal with them all the time in the past - or at least, that's what I get from some of his writings anyway. So I imagine him popping this stuff in as a sort of early warning system. It's all true enough to be right, and true enough to get his point across, BUT IT'S NOT TRUE ENOUGH FOR A NERD. So any time somebody complains about his strcpy example, or 0-terminated C strings, or whatever, that's his nerd alert. This person is not worth dealing with, and now he can block them, or set up a mail filter to put their email in the junk folder, or whatever, without having had to invest any time in finding this out the long way.
There was also a bit in one of his essays about the way ruby fans were always these stupid armchair pop psychologists.
I mean, he's right.. but he's not being profound. You may as well tell me that I should be careful about losing precision while using floats. Yes... no shit?