I think it is not that work necessarily ruins everything. The problem is turning your hobby into a job means turning your hobby into a business, which is were in my opinion most of the friction comes in.

For programming the difference between what I like to do and what I can easily get paid to do is not that big, so it makes sense to combine as a career advice. But for hobbies like music or painting, unless you get extremely lucky, it is whole lot harder, takes much longer and requires to make much more compromises to get to the point where it is really fulfilling.

I only ever tried the latter semi-professionally. And it was already a soul crushing experience at times.