He's right about the razors edge in the biz he chose to get into. Also, with the judgement he shows about other things in the article, I'm not sure if his family investor is the actual utility he says he is. Propping up 'family' and '10 years' doesn't really say anything about track record. I've got family that have been in things for 10 years and they are still middling or just straight up bad at their jobs. Some of them have even made a lot of money at jobs they are bad at.
This is a high stakes and risk endeavor that not only is OPs dream, but it's a dream he's stapled his name to. To me, it sounds like he took himself on a ride with an inheritance and had poor cherrypicked counsel or he ignored them because he was 'the leader of the band'. Even if they were good, the entire article is about how the environment he chose is the problem, not his own judgement. I think he'll come around to what really happened eventually and I bet he's going to try hard/weird shit again because this is a really crazy idea packed full of hubris. The guy dreams big dreams.
To say his family investor 'with nearly a decade in the biz' was an insulator against failure is like saying that having the best Wingsuit Skydiver in the world showing you how to jump the first time will keep you from turning into a crater.
I think it's good practice to almost never work with family on building commercially melded creative dreams. Their goals, by relation, are inherently stacked against you because what you need in a hostile creative operation is sober and careful partners that challenge you to stretch your abilities. Family cannot, by definition, be that. They care to keep you safe and similar.
If you do engage with family on that level, you really have to be aware that you might permanently damage an important relationship that you might not get back and treat it with that respect. Close family and friends are something you can't recreate by meeting a replacement. You can always start another biz. Any family that might engage in a business/passion idea with a caviler attitude could be taking your familiarity for a ride that you don't want to go on. Intentionally, or more destructively, ignorant as fuck to the consequences.