Union of mind/body/soul can happen without marriage or at a later point in marriage (if its arranged one).
Point is that common sense is quiet uncommon these days (especially in non scientific or superstition laden astrology approach) and astrology is being abused as an excuse for failure to do our own karma or improve ourselves by querents.
Agree with you on all bull-shit with remedies and corresponding profit making nexus.
Astrologer Deepak