You cannot just scale down the numbers and pretend like the world around you doesn't exist. There isn't much I'll do with 1 dollar. There's a shitload Microsoft could do with 10 000 000 000 dollars.

Opportunity costs are a thing.

There actually becomes a point where there’s not that many things you can do with your money when you have so much of it.

This is especially true when your investors/owners expect you to generate better returns than the risk-free rate.