Regarding this, the intellect must not be considered as intelligence.
It can be said that:
Intellect and heavy memory are friends.
Intelligence and weight "less" memory are friends.
For example: The capital of France is Paris. This is just intellect. A memory. No intelligence is required for it. Intelligence does not have ground to develop.
Second is playing the game of chess: Intelligence is required for it. Memory is not needed to large extent. Only processing is done. Intellect does not have ground to develop.