All this is reasonable.
But a marriage can be broken, and it just takes one of the two people to do so. There is no way a marriage can continue if one of the two doesn't want it. Therefore... it's not really binding. The only binding it can do, is to create a pain-in-ass in legal stuff, wasting money on divorce lawyers, paperwork etc. But even if it's terribly frustrating, this pain-in-ass has never prevented someone to break a marriage. Therefore you won't be safe after married, although the feeling of safety may be a good thing anyway.
Some friends of mine are like that: they absolutely don't want to be married, even tho they are living together and have kids. There is a block deep in their mind which makes marriage a scary thing. But in other people, there is a similar block making not-being-married a scary thing as well
Is there a middle ground in your country legislation you can consider, such as a lesser but official status for couples?
I don't have much else to suggest here... Except that I find it very pathetic when someone aged beyond 50 calls his partner "my girlfriend", "my baby" or "my woman" because he cannot call her "my WIFE", but I guess this ain't going to convince him![]()