On the other hand, this is exactly why the appointment of married men as bishops ended in the second century
Yes, but it is not relevant to a vow of celibacy taken by a monk. Monks take vows of celibacy as a part of religious life, and in the community Luther chose, don’t have personal possessions. He chose the most austere order for himself.
But the early preference for unmarried Bishops had more to do with Paul’s instruction that their attentions not be divided.
Yet those who marry will have worldly troubles, and I would spare you that. I Cor 7:28
32 I want you to be free from anxieties. The unmarried man is anxious about the affairs of the Lord, how to please the Lord; 33 but the married man is anxious about worldly affairs, how to please his wife, 34 and his interests are divided. I Cor 7:32
Christianity was illegal until the Edict of Milan, so the notion that the Church was somehow hoarding land and property in the first three centuries is difficult to fathom. Christians were still practicing their faith in secret, and any land or assets would have been seized by the Empire.
Married priests and bishops persisted through the 8th century, at which time there were, indeed, property issues. When the spouses and offspring of priests wanted the Church to support them there were legal claims. Then, just as in secular cases, there was the issue of “illegitimate” children. These cases persistent through the middle ages, and even involved popes.
One can see why the Church would prefer to choose from among those called to celibacy! But none of this applied to Luther. He did not want anything to do with the CC, including land or money.
The worst part is, that as a priest, monk, and professor of theology, he would have known this.
Well, at that point his faculties to function as a priest had been revoked, and he had lost his professorship post. His attitude toward religious life/vows is one reason that we don’t find religious communities like this in the evangelical world.