Bunny are you alright? You normally sound so reasonable.
Marriage, and as the beginning of marriage, weddings, make all the hidden expectations and needs come out of the woodwork. Not only for the bride and groom, but the parents, friends, etc. The couple has a lot to deal with, and the bride most of all. Just the planning, even if you start out wanting a simple, inexpensive wedding, can be daunting. Then, all the feelings of all the friends and family. The issues with the other family. Your own fears and doubts.
People do it for various reasons, one of which may be that they want to have a formal commitment that will keep the couple together during the hardest times. Another reason is to formalise the commitment before others so that people recognise it and know the partners are serious. While partners may be serious while living together, or even not, that is not declared to the world.
Like many things, the practice of marriage does not always live up to its ideals. But we don't have to say that marriage is bad in itself, do we? That's like saying holidays are naturally bad. They may be bad for us. But for others they are good, and that means that one fine day, for us they will be good also.
an optimistic
Plucky