The Latin rite is only exceptional in not letting a married man become a priest.The Latin Rite is the only rite that will not allow a married member of its own rite become a priest, but will allow married men from other Rites and married Protestant converts become priests.
Could you tell me what, in your opinion, is the "greater spiritual good" served in this inequity?
The greater spiritual good is the return of a separated brother to the Catholic church and ostensibly the Latin rite's getting a new, experienced priest.
You can't seem to get past your perception of "inequity." Are you really a deacon and is bothering you that you can't become a priest?