> It doesn't follow that moving resources from one place to the other is the right choice. When you have two things that both produce benefits exceeding their costs, you're better off to do both of them.

Yes, in an imaginary world we can invest in all the good things at the same time.

In the real world you have a limited amount of resources, so you can't do everything at the same time without borrowing money. But guess what, borrowing money is moving resources from one place to an other.