My point was many software engineers see the product in their mind and think "I can build that!" and think that building it is 99% of the work and if they just built it the money will flow. But it turns out building it is only 10% of the work and when the other 90% of the work presents itself the drive to ship disappears.

In the OP's case the people that shipped found a way to get all the parts needed to ship read. The person didn't ship probably just wrote some code and never even considered the other 9 of 10 things that would need to be done to actually ship.

I'm probably thinking of myself to some degree. I made a product. Maybe I didn't have enough confidence to find partners or investors. I piddled with it for about 18 months, had a few public displays, and then at a trade show I saw someone who was serious with basically the same product but unlike me they found investors, hired people, and had a real company. They didn't just make some tech and a demo (what I did).