I understand your viewpoint, but I feel like you are talking about something else entirely. GP discussed (paraphrasing): "building a product, trying to get customers", so to respond by saying "it's not a product, I don't want customers" isn't exactly continuing the discussion.
For hobby projects, I agree with you whole-heartedly.
That’s the other side of the builder mindset. It’s relatively easy for builders to build things that solve their own problems. That’s a tool and builders like tools. It takes a really big mental leap to go from “I built a thing” to “I built a product.”
The thing is, things are products. But the answer isn’t “all hackers are wrong, you’re dumb for not involving me early on.” Rather, the answer is ‘chill, you’ve got this.’
For hobby projects, I agree with you whole-heartedly.