That's pretty difficult to obtain. For typical creative passions, you need to be in the top 1% for them to sustain you.
I am into product development, particularly products that are what I would call “full stack.”
Electronics, firmware, software, and web stack all developed for the product.
If, on the other hand, you're passionate about software development and electronics, then it's a very common passion and you have to be in the top 1% to make a living out of your creations. Of course, there are subniches with various degrees of difficulty - it's easier to make money on some technically simple B2B SaaS than on consumer robots for example.
I don't understand your point. Isn't there a massive chunk of people who are passionate about "software development and electronics" that make a living off of it?