All your points are valid. However you're only looking at it in a way that's familiar to you.
Here's a personal example, my parents bought a condo in China in a new development area, searched around for renovators and found this shop close by that seemed fairly legit. A show room, full staff, decent looking portfolio, sales people looked legit and they had legit looking supply chain relationship as well.
My parents worked out a project scope and plan, estimated the cost, put down 25% for down payment. The shop came in, did a month of work and then disappeared. Job was half done. what happened? They went "bankrupt".
Are the shop owners risk takers? Maybe. Did they really try to start a business? Honestly they probably saw an opportunity where a new development area was coming up and came in for the quick buck. Borrowed some money, set up shop to a decent level and then disappear.
This isn't an isolated case, lots of examples exist. Am I saying this is the case for everyone? No. But its gotten bad enough that the government had to do something about it. Is it my parents fault for not doing more due diligence? Probably. But it's really really tiresome if you had to do this every. single. time. for everything.