My experience is that some people (of all generations) react really strongly against anything that involves birth and family.

IVF, gamete donation, surrogacy, gay families, various experiments with human embryos or artificial wombs, much or all of this is banned in many countries of the world mostly due to the "ick" factor. The smarter opponents tend to decorate their objections in the "we must be very, very careful" cloak, but if you dig deeper, you will find that it is indeed just a cloak in many cases and that the underlying root cause is "ick, this is against nature", and "really careful" means "erect impossibly high barriers by law".

This even isn't subject to polarization and seems to be shared across the political board.