I don't think I'm superior AT ALL, but I am a wife because I chose to get married. If you chose a different road, you are not, in fact, a wife or a husband, so why would you say you were?
We're playing Monopoly. You want to be The Car, I want to be The Ship. Why would you say you are the Ship if you are the Car.
Society doesn't force us these days - it used to. Your relationship will be taken seriously and properly by ALL the authorities. if you choose to shun the formal bit, why on earth would you pretend you haven't?
If you have a life partner that you want to describe as a husband, then marry them.
If you don't, find another term.
Do you say "I'm having my period" when you're not?
Do you say "yes, I cycle everywhere" when you only ever take the car or the the bus?
Do you say "I always recycle" when you don't?
Why would you do ANY of those things?
Equally, why would you say you're married when you're not?
It's such a no-brainer, and so irritating!