Earlier quoted context omitted.
Yes but picking between investment opportunities is a bit different than starting a company. If you have enough money to buy a significant chunk in an angel round then you also have enough money to open yourself up to other less risky investment opportunities.
Some people like living on the edge. Angels are a certain kind of crazy. Also high risk -> high reward, right? 10x in 7 years can be game changing.
Maybe turning this around will help you see how ineffectual this is:
If you are a naive investor desperate to put all of your small stake into one company and I am an early stage startup, why would I want your money if I can have smart money with a good network instead?
And if I can't have that, if I'm desperate for the investment, well your odds just got much, much worse.