Actually, there is a rational reason to believe so. The problem is that the rationale only made sense prior to 1977 and 1987.
I'm married. My wife and I are both healthy, cis-gendered heterosexual people who have no intention whatsoever to have kids.
Is our marriage irrational?
I promise you that if a solar flares wiped out all electronics and rendered --somehow-- all DNA labs useless for the next 100 years, we'd be practicing those laws again without thinking twice.
Not without a fight.
We have too many damn people on the planet already.
Quite frankly, I think IVF is an incredibly selfish act. If you can't have kids, and you want some, why not adopt or foster?