I don’t see this loneliness as a Catholic problem as much as society in general problem. I think there is a real tendency to see being paired up, preferably with children as the preferred state. On a practical level many people who pair up (whether gay or straight, Christian or non-Christian, married or cohabiting) will cut themselves off and only make time for their partner. In addition parents are a lot more cautious about who they have around their children. Sometimes it seems that people conflate the paired up state with maturity despite the character of the person.
All this can unintentionally leave singles out in the cold so it doesn’t surprise me that people are horrified at the idea of enforced celibacy. It shouldn’t inevitably mean lonely but it too often does.
I agree with your observation.
To add to it, if you compare the society we have now with that which we had mid 20th Century (and I know that not everything was rosy back then), we have developed one that sort of enhances or pre loads loneliness.
Walk around your town and I bet you’ll find lots of buildings built by fraternal lodges that are now used for something else.
Just consider the KoC, for example. In my town, in the 40s and 50s, if you were a Catholic man you were in the Knights. You just were. The Knights had a bar in their building. Lots of men hit the bar on the way home from work or maybe in the evening. Around closing time, the Priest (a Monsignor) stopped in, every night, to check on everyone there and to make sure they closed.
Was this a good Catholic thing? Yes it was, but it was an example of what happened on a larger scale. Beyond that, even in my own experience (I was born in the early 1960s) I well remember that if you worked in manual labor or if you were in the military service, and your group of co-workers reached quitting time (or got leave) you always ended up taking the whole group, usually, for a beer or something.
Included in that group was the really odd not so smart person who hardly talked. That same person today is the kid in his parents basement who plays violent video games all day and has nowhere to go to. But he was part of the group and and that meant something.
Also included, and we all knew it even if we didn’t say it, was the guy who was a homosexual. I’m sure things were hard on him, and it wasn’t talked about, unless he was teased about getting a girlfriend (which I’m sure wasn’t welcome), but the point is that he was part of the larger group.
Now, all this is sort of gone. That sort of labor has left, and people work alone all day and then go home by themselves and turn on “Friends” or the “Big Bang Theory” and watch fictional friends have the lives they don’t. Even married people often depart to their single computers, or their individual televisions, and fail to discourse all night.