[kirso]

I believe you missed the point.

Sure, you can entertain doing hobby music by yourself out of passion and it can have 0 listens and thats great. Keep doing what you love!

The tweet however is in the context of a JOB or CAREER.

If you code and produce 0 value in either saving engineering hours, saving money, producing revenue - whats the point?

So the analogy is rather about having an understanding and skills of a full-stack product person that has the context to build valuable things, rather than typing on keyboard in isolation.