I'm almost positive that if we dig in a modern project dependency tree deep enough we'll find at least a couple that have an inappropriate joke in the readme or in the documentation. So how would recutils be any different?
Unfortunately, that argument is entirely straw man. Most corporate environments are absolutely fine with memorable non-functional logos. The issue is the narrative about gay turtle sex and perhaps the implied suggestion that the “rec” in recutils might stand for rectum.
In my personal life, I’m comfortable discussing turtles and rectums and sex and homosexuality. But I don’t want to discuss those topics at work with my co-workers, and most corporate environments aren’t just avoiding them for fun because they’re a bunch of stiffs, they’re avoiding such topics because there is a history of them causing actual problems at work, often lead to hurt feelings and the sense that the environment is not welcoming to all, and as a result there are several ways they’re legally required to encourage employees to avoid discussing such topics, and legally required to take disciplinary action if someone complains that someone else made negative comments about gay turtles or sex.
BTW this is all a side point to the fact that this photograph of turtles makes a terrible logo. It doesn’t work as a small icon or with reduced colors. It has no shape or symbolism. It’s unrelated to the product. It’s hard to see the detail even as a large full color image. The only thing that makes this logo memorable is the FAQ text, the story that it’s gay copulating turtles, which for all we know isn’t even true - turtles sometimes climb over each other, sometimes fight, and there’s no way to identify the sex of the turtles from this photo.