Firstly, let us clear up the point about married priests. The Latin rite has married priests. It is less common than the Orthodox, but they are there.
Married men may be ordained to the diaconate as Permanent Deacons, but in the Latin Rite of the Roman Catholic Church generally may not be ordained to the priesthood. In the Eastern Catholic Churches and in the Eastern Orthodox Church married deacons may be ordained priests, but may not become bishops. Bishops in the Eastern Rites and the Eastern Orthodox churches are almost always drawn from among monks, who have taken a vow of celibacy. They may be widowers, though; it is not required of them never to have been married.
In some cases widowed permanent deacons have been ordained to the priesthood. There have been some situations in which men previously married and ordained to the priesthood in an Anglican church or in a Lutheran Protestant church have been ordained to the Catholic priesthood, sometimes sub conditione (conditionally), and allowed to function much as an Eastern Rite priest but in a Latin Rite setting; however, this may only happen with the approval of the priest’s Bishop and a special permission by the Pope.
I believe that there are fewer distractions away from the duties of a priest if unmarried. I have had this conversation with several married Anglican and Lutheran clergy and privately, they each have told me that they have felt a little envy sometimes that the unmarried Catholic priests can devote more time, energy and thought to their calling.
Ideally suited? I suppose that that is like the rule that some states have that nobody can use a cell phone whilst driving. Some can use a cell phone just fine. But many cannot and that is why the rule is there. Remember, though, the Church does make exceptions for suitable individuals. Does that answer the question?
I certainly wouldn't argue with unmarried priests having fewer distrations and it is what Paul tells us in scripture. But the Church making "exception" is a far different thing then allowing priests to marry. We know there are a vocal group of priest who would like the marry that the Church has refused to allow. There really is no theological reason and, yes, that does answer my question.