To start, I'm sorry you had to go through that. My spouse and I had similar experiences while trying to conceive.

Loss is not funny to most people due to the contrast, but because of the sheer audacity of it's existence. The gaming webcomic that it was a part of had already run for years, focused around 1-dimensional characters making low-brow jokes and silly violent scenarios centered within mid-2000s "randomness". Suddenly, in 2008, the creator releases Loss, a manipulative, tone deaf strip about one of the worst physical and emotional traumas imaginable, shocking readers and earning infamy. Basically, it's a meme because it's so fucked. It's why people who share it only refer to the work superficially by name or pattern, rather than by content, almost like a tragedy.