I think this is a weird framing of the issue. Sure, lots of businesses go under, and maybe being larger would have saved them, but maybe not. Plenty of VC-funded businesses go under precisely because they tried to be too large, when they could have perfectly comfortably served a few satisfied initial clients for enough money to pay all their bills.

I think the idea that companies go under because they aren't ambitious enough says more about modern attitudes towards growth than it does about the reality of business.