I am not ignorant in this field.

Your tree example is also an example of a naturally limiting system. No matter how much water and stored sugar the tree has (or is given) there is only so much area the tree can cover with leaves. And, the tree never blocks out all the sunlight.

Imagine if Billy Gatez went to a grocery store, and just bought everything on every shelf. That would be called capitalism, but the part that is bad is that there is no natural limiting system. Like a manager that says, no Mr. Gatez, you cannot clean out the store. You may only buy what you can eat in a reasonable amount of time. And if you want more, you will need to order it and wait for it to come through the system.