Matching Exists Because the Moon's Nakshatra Sets Mind and Dasha

Kundali matching became a marriage custom because the Moon's nakshatra sets the mind and the first dasha, not because the 7th house is optional. Manas is the Moon. A couple's daily temperament is lunar in a way the Sun sign is not. The first mahadasha is the balance of the birth nakshatra's lord, so the Moon also starts the clock. Comparing two Moons is a rational custom inside that theory. It answers whether the feeling-minds and the opening clocks clash. It does not answer whether each 7th lord can marry. Necessity is the community's word. The chart's word is usefulness, limited and real.

In practice, matching means a family asks for peace between two Chandra rashis before it asks for peace between two people. The 36 points give the ask a number. Nadi and bhakoot carry the fear, because they are 8 and 7. A couple that clears them and ignores a Saturn aspect on the 7th has cleared the custom and kept the delay. A couple that fails them and has strong 7th lords has failed the custom and may still have a workable bond. Meaning: the score is a social and lunar filter. It is not the prediction. Love marriages sometimes skip it and then meet the same 7th-house facts. Arranged marriages sometimes worship it and never cast the lagna. Both miss half.

It is necessary if the families have agreed that a Moon match is part of consent. It is not necessary for the sky to keep moving, and it is not necessary for a 5th-7th love yoga to exist. Those yogas do not check varna. If you want the custom to mean something sturdy, pair it with both birth times, both 7th lords, and both D9 charts. Then the word necessary can mean necessary for a full reading. If you only have the Moons, say you have done the historical match and not the marriage houses. That sentence is more honest than a mandate. The Moon starts the dasha. The 7th lord finishes the wedding question.