if we mobilized a whole-of-society effort to build millions of rocket engines and fired them year round, it'd only take a few hundred years to get this done
The human mind is the product of a brutal optimization function over a billion years old. That process of optimization has extended into the operation of the human mind itself. The human mind itself is an optimization machine. It can always imagine a better way to do things. Don't let the fact that there is a better way to do a thing stop you from doing the thing. There is always a better way.