Ok, I will grant people’s legitimate concerns and put this into some real situations:
I guess what it really comes down to for me, intellectually, is, can there really ever be any situation in which a putative “union” between two non-family-related individuals is non-romantic? I mean, that’s just kind of weird. I have a good friend, let’s call him John. Imagine I say to him, “Hey, John! So, whaddya think about we ‘unioning’ ourselves so we can get a better deal on our health insurance

?” I use a same-sex situation here, but this applies equally for opposite-sex situations. I say, “Hey Alison, wanna ‘union’ ourselves so we can get a better quote on our car insurance policy? I mean, this is strictly non-romantic, you know
wink wink ?” That’s still extremely weird and suspect.
But then maybe someone will say, well what about the situation where people band together to get cheaper phone service, like the Sprint Family Plan? Well… still, that’s not really a “union,” although very often these people will be families.
The “union” terminology is what gets me. If it is a “union” then that has extremely romantic connotations. If it’s not a union then why call it a union? Just call it “a group of friends agrees to join together to get health insurance as a corporate body instead of individually so that 1. the company gets more customers and 2. the friends get a better deal.” Wordy, but we avoid this weird situation entirely. We don’t call whole companies’ worth of people who purchase health insurance through their employers “unions” of people (disregard if there is a union in the traditional sense of employment), even though that term may be useful in, say, economics discussions or something. There is no name for that that indicates a “union” of people in any sense. It’s just “a group of people who purchase insurance through their employer.” I mean, I definitely don’t consider myself in “union” with any of my fellow students even though we all purchase insurance through our school for our particular academic program.
But, to cut to the point… for some reason… I don’t really think that’s the motivation behind 99.7% of so-called “unions” being talked about, even in Catholic circles.
So I grant that the Pope sees real (possible) situations where this could apply to real life in a moral(ly neutral) way. I agree, both intellectually and practically. But, these are not really “unions,” they’re just economic situations. I mean, this already exists, so why invent a new word for it? Well, because, in my opinion, that’s really not the motivation in this supposedly “new” situation. I mean come on, to use a term that at this time in history that in the vast majority of popular usage refers to a romantic connection to describe what is, in fact, *simply *an economic phenomenon? That doesn’t show up on any radars? Puh-leeze!