I disagree with your disagreement!

Anyone who has built a personal project and a real-world professionally engineered project knows that the actual tasks involved are wildly different. What you think the correct solution is becomes a tertiary consideration. You need to consider the desires of stakeholders, money people, regulators, and quite a few others. Designing a treehouse for fun and designing a professional solution to a list of sometimes contradictory constraints and optimizations scratch some very different itches.

One is very clearly play and one is very clearly work.