You can turn everything into a business as long as you have a reasonable business plan in place and know that users are willing to pay for some extra features or service.

Story time: 2 years ago I started to learn frontend web development from various online courses. I had zero technical background and no intention to make money. Within few months I learned enough to create my first WordPress theme. It was terrible but it worked . I made few more themes and never did anything with them. I made like 6 themes and just deleted theme few months down the road. Then I decided to submit one theme on WordPress.org just to see if it gets approved. Themes goes through review and someone would evaluate my code and that's what I was after. Long story short my themes now have been downloaded over 1,000,000 times and I have turned it into 6 figure a year business.

While I haven't sold a single theme yet, apparently you can recommend hosting and premium plugins that goes along with your themes and make a decent income.

For those interested you can visit site at: https://colorlib.com/