That's you. Lots of people are perfectly fine without the need for family/friends 24/7. The site clearly stated he had been working on the project since 2008, so they could spend a few weekends here & there on the project and still have plenty of time left for doing whatever else makes you (specific you not the royal one) approve of his endeavors. I might suggest you might have more free time yourself if you just accept things not in your control rather than worrying about how someone else does things you might choose to do differently. I'm suspecting that this is not the only example. You haven't mentioned your hobbies. Let's see if we approve of how you spend your time.
We don't all share the same values, and it's pretty arrogant of you to suggest that yours are universal.
I would rather spend time with friends and family, play games, read books, travel, etc.
I'm drawing attention to the opportunity cost inherit when you choose any one thing to spend your time on - you can't spend it on anything else, so make it something truly important to you.
If that happens to be building models, so much the merrier.