What about "because it's fun"? There used to be a typical response hackers would use when asked why they built something nerdy but ultimately pointless which w

What about "because it's fun"? There used to be a typical response hackers would use when asked why they built something nerdy but ultimately pointless which went "because I can." That equally applies here. Some people build model railways, others like to solve crosswords or sudokus. I like my railways to be computing infra and puzzles to be software problems. It's the same kind of enjoyment but playing with different toys.