Debating the science of when a foetus is viable rather than the relevance of viability itself implicitly accepts that a late-stage foetus's claim on existence outweighs the mother's right to bodily autonomy.
Rape and violence against women could, with care, become one of those issues we take over as comics and turn the message around - perhaps in the same way that non-white comedians have had to tackle racism over decades, or gay comics the topic of homophobia.