That is an excellent point. In fairness whenever I didn't travel solo, I travelled with someone who enjoyed exactly the same things as I, and that can be quite rare. I suppose for me it wouldn't even have to be always a shared experience, just the opportunity to compare and contrast the experiences at the end of the day while hanging out or having a meal together. Even that would be a big upgrade for me. I know it stems from a selfish need of expressing my views on experiences to some extent, but it really can be quite mind-blowing when the other person reciprocates and shares their view as well.
Now, imagine having gone to The LEGO House with an AFOL like me. 😁 Tons of fun!