One's own health and life are paramount because, in the final analysis, that's all we have is ourselves; we can't live another person's life or they, ours. The marriage vows are religious in nature and the certificate, legal, so depends on how one feels about one's religion if one is talking about the vows. The societal "system" is designed to make it a bit difficult so people at least try to work together and learn to love one another, etc. instead of just coming and going and having children on a whim. But I've know particularly sensitive or religious people to take it a bit too far and sacrifice themselves which I don't think it is healthy.

I've been married nearly 20 years and knew who I was and who my husband was, etc. before I married (we were together 5 years before we married) and was quite sure I loved him and he me and that we could work together well in a marriage relationship. I've never even thought about potential divorce between the two of us.