I have to say I disagree with your particular point that a church with a full size nursery and no married couples is a church you should leave. In fact, after ten 10 years at my current church, our family is now in the process of finding to a new church home because the predominately old grumpety grumps in our current church no longer want to spend a couple thousand a year towards a Sunday nursery caregiver. These old folks feel that only those who use the nursery should pay for the nursery if they want such things.
They fail to realize that the young folks that are going to the church don’t want to stay in a church that cannot accommodate basic young married couples needs, such as youth clubs and child care during service. Is it no surprise that this church is like a dying old tree that will no longer grow young healthy fruit or increase in size. What young couple would want to go to a church that is essentially dying and that discourages vitality and growth?
Understand, I have no problem volunteer to work in a volunteer nursery from time to time as I have young kids. But if my wife and I have to volunteer to work in a volunteer only nursery 1 to 2 times a month, then why bother going to a church where I can’t even hear the sermon half of month because we are stuck in the nursery?