Hobbies always change when they become a job because it transitions from well thought out, interesting and creative projects to mass production and monotony.

As a hobbyist you have the ability to discover and work on unique, novel projects, without stress but professionalism is about consistency and speed.

Usually by running the business you can dedicate some time and resources to the fun and novel stuff. Thats how I run mine at least, as a woodworker. I don’t crank out high grossing trendy stuff day and night but take the time to explore new ideas and get creative with it. That and using handtools instead of power tools.