Yes, because the celibate priest is also an orphan. No parents. No brothers or sisters. And certainly, no friends.
Maybe not as logical as you thought.
The celibate priest is no orphan - he has parents and brothers, nieces and nephews. And as many friends as he cares to make. One of our priests went on vacation with my family and rented a beach house with us several times. But even so, this claim would not help argue against a celibate priest having more time for his duties. It does require a large sacrifice, but it does at least achieve that end.
There are reasons for priestly celibacy that do in fact make sense, but of course there are advantages to the other side as well. I tend to think that the balance favors celibacy, but there is no need to pretend that the opposing view is entirely without merit.
In terms of our converts however - why worry? Celibacy is the Church’s discipline which it can waive at will, and if it decides that what should be true most of the time need not apply in a specific case because other considerations come out on top for a particular person, then so be it. Then discipline will hold as long as it is deemed a good idea.
As a side note, I am amused by there being a influx of Anglicans into the ordinariate, driven at least partially by belief in traditional theology and morals, and the news headline is “More Married Priests.” I mean, come on, way to miss the point.