In fact it's odd these days to meet someone who is still married to the first person they married
This is true, and it is quite a shame, maybe the culture of getting rid of the "old" and quickly acquiring something "new" can be related to this? I am not sure, but there must be a reason why divorces are getting so common compared to how things were in the past.
Maybe people are getting married without doing a thoroughly evaluation of their partner? What do you think?
Well, I think there's some of that, but most people really do try. I think a big difference is people aren't guilted into staying in relationships that are unhealthy, unhappy, toxic, and/or abusive. Women, in particular, have been strong armed by religion and social norms into staying in terrible situations, often while simultaneously being told it's their fault their husband is abusive or unfaithful.