This is another of those scientific experiments designed to prove that humans are not really different from animals. Here we have a case of an ape that was willing to wait for a delicious treat, not a case of an ape planning ahead.
The conclusion that “Apes can plan ahead” was the desired conclusion and the experiment was arranged so as to produce the desired outcome.
The flaw is that the experimenter assumed that the ape was planning ahead. It’s possible that the ape fooled around with the “tool” and then was very happy later to receive the delicious fruit soup.
That doesn’t prove that the ape was planning ahead.
The difference between animals and humans is that humans are very much more intelligent than animals.
Let’s see an ape plan for his retirement. Will the ape put away 10% of the bananas that it finds instead of eating them? Will the ape even know what I’m talking about?
I would be really impressed if apes could be trained to do work entirely unrelated to the obtaining of food (or delicious treats) in exchange for poker chips that they can then trade in at the Zoo commissary for food, or save up to buy delicious treats.
Humans are animals, by definition.