I'm sorry to hear about your circumstances.
Me and most of my friend/family group have married in the last few years and I don't know if anyone would have bothered if there wasn't a promise of forever. There's often the desire for a home and kids and it's (in my opinion) hard to do that if you don't have a commitment from your partner. I don't want to raise kids alone or have to do custody arrangements if I can avoid it.
If housing and child rearing were more communal it would maybe be different but I think the commitment is kind of the point.
If you'd be willing to share your experience please feel free to. I didn't have the experience of married parents or even watching them interact/divorce so I'm always on edge regarding the kind of issues I'm possibly missing in my own relationship.
Not really true. Plenty of mom and pop shops close because no one wants to run it and they don't want to ruin the reputation of their family business by selling it to someone who might not run it well. I worked for a few places where this happened.