I felt a similar reaction to the tone of the article. Twice the author said 'You may as well not have bothered' if no one recognized the value of your output. And your response also frames it as 'What you've done has no value outside of yourself'.

I think what the post you're replying to is getting at is that by framing things this way we overvalue things which others approve of, and undervalue things we enjoy doing for the sake of doing.