My coworker highlighted just one single project that gets deployed as one unit. I have a second hobby project I work on at home of which I also take ownership.

My coworker highlighted just one single project that gets deployed as one unit. I have a second hobby project I work on at home of which I also take ownership. He is building a monolith, I am not? Even though we are working on the exact same project? Um. Okay. So, just so I am clear, the advice here can be rephrased as: "Save a matter of life or death, don't have hobbies"?