Marriage is the ultimate sign of commitment, making your relationship legal and/or spiritual while declaring it in front family and friends.
Men who are against marriage are seemingly against commitment, but I think that comes out of a strong desire for commitment and stability.
Children are whole different issue from marriage admittedly.
But it's text, an entire persons message history can be stored very cheaply.
A million words is only 2MB.
Most people are expexted to text less than 10 millions words in a lifetime.
An entire persons lifetime message history is only 20MB, that's trivial to store.
If they want to charge to save media, thats fine, but text backups should be free