I think a big part of why it’s funny is because the original was so very NOT funny. It was such an intensely dark shift in tone, a deliberately serious dramatic beat, in a comic that was all silly fun, completely unexpected and out of place.

If it was just a miscarriage joke then yeah it’d just be purely fucked up, and pretty quickly forgotten. It’s the meta context that turns the whole thing into more of a joke than any single comic could tell.