could you live in a tiny house?

em
I'm currently watching Tiny House, Big Living (don't hate lol) and I remembered an episode of House Hunters where a family of five (mum, dad, toddler and two pre-teens) moved into a tiny house.
I personally couldn't as I'd feel like I need breathing room and do get claustrophobic, and I'm always going to have a big dog and wouldn't want to keep them outside. I also believe it was selfish of those parents to move into a tiny house. Their kids are almost teenagers, and teens need privacy, room to grow, express themselves and develop who they are.