No! The reasons are absolutely valid. It's just interesting to see that the lean and cool startup is very similar to an established enterprise in that regard.
The trust is in quotes because I'm not sure what to think about it. Every month I see a post here about some AWS service outage but it looks like nobody is getting nervous because of this. People just wait until it is fixed. On the other hand, I have experienced that people begin to trust companies because the company advertises on TV. But AWS has earned its trust legitimately I think.
The whole concept of "confidence/trust in companies" is so important but I know so little about it.