The notion that churches must be closed because there is a shortage of priests is senseless. In order to justify it, one must assume the priest shortage will stretch into the future indefinitely. Not only your children, but your grandchildren and great-grandchildren will suffer it. It is a permanent condition.
Really? Do you really believe that?
Second, how do dioceses around the world handle priest shortages? Well, they usually move the one (priest) around to the different churches. They don't destroy buildings and make hundreds travel. Simple logistics.
Third, our churches house the tabernacle. Our Lord dwells there, bodily. They are holy places and we don't destroy them just because we might not be able to have a resident priest. Keeping them is a sign of hope that the future will be brighter for our children and grandchildren. It speaks to the continuity of Faith in a foundational way.
Fourth, closing churches destroys a sense of community. It tears at the spiritual and social fabric of a neighborhood. It separates a people from their heritage. Churches are a reminder of heaven here on earth.