Celibacy was revered from the early days of the Church. As can be seen by Paul's example, if you want to give 100% to the Lord, it is best not to be emcumbered by a wife. But apart from the practical side, if we are to listen to Paul, we must always lives as though the Lord were coming tomorrow. If he were to establish a physical kingdom, he certainly would have left us heirs as David did. He did not. Unlike the Jews of the time, Christians never put great stock in family. That is why the passage in Mark where he choose his spiritual family over his physical one was meant to distance the Christian from the ordinary Judaic view.
I suppose Paul and Peter never told husbands to submit to their wives and wives to submit to their husbands and fathers to be kind to children. The Bible is a great manual for living life with others, including family....