I think you've excellently captured the difference here. I didn't get heavily into Elite Dangerous, but on one of my longest journeys, I scanned a few things that no-one had ever scanned before. I didn't discover any awesome looking space phenomena that would be worth sharing (at least, none that hadn't been discovered before), but the prospect that I could was exciting.
Even just the idea that my name would be on other people's screens if they came and scanned the same things I did, because we were all sharing the same world.
I can really relate. My mood tanks everytime I see a reminder of the holidays. I used to have a friend who was also estranged from his family, and we'd be grumpy arseholes together over Christmas.