Just consider most people really like sex, and some experience it as a very intense physical want to the point it makes sense that a bad version of it is better than none at all. Sort of similar to food. Better to have bad-tasting food and at least sate your hunger than to have nothing and starve.

Although, of course, it breaks down. The comments talk about actively harmful sex people wouldn't want as well as harmful documentation; bad sex and documentation is not actually always better than no sex or no documentation. In the analogy, this would be sex that gives you an STD, or documentation that sends you running in circles and misleads you.

I've found a lot of understanding sex comes with just understanding a lot of people really really want it and experience it as a nigh-on need. Maybe liken it to some intense desires you have, things you need to be happy that you nonetheless don't need to survive. (Of course, this is a generalization, I understand not all people with sexual desires have them this intensely. Some don't need it to be happy but would sure like it a lot. And some might even get it more mildly. But for the purpose of understanding more mainstream jokes, analogies, etc. about sex…)