"with which God expected Catholics to comply"
Kind of an odd statement - EdT

Perhaps odd-sounding to a non-Catholic, but Ed, you claim to be - or to have been - a Catholic, so you should be aware of the source of the Church's mandate to 'bind and loose' in ecclesiastical matters like laws of fasting and abstinence. Few Catholics would dispute the Church's authority in such matters. The laws regarding, for example, mixed marriages have also changed over the years.

Whether that authority extends to matters not related to worship, such as which methods of birth control or fertility enhancement are acceptable, is another matter.