Morpheus was sjown to be wrong on many points, this may be another rationalisation he made. He may have assumed or accepted that it was the reason for being kept in the simulation, without really knowing the truth.
It could be that the characters in the movie thought it was about energy, but were mistaken. (But to be honest, having a group of people believe that to be the reason is just as implausible as it actually being the reason - either way it makes no sense and we just have to suspend disbelief.)
The movie already set that as the reason so Animatrix had to follow.
Morpheus was sjown to be wrong on many points, this may be another rationalisation he made. He may have assumed or accepted that it was the reason for being kept in the simulation, without really knowing the truth.
That’s a good point.
It could be that the characters in the movie thought it was about energy, but were mistaken. (But to be honest, having a group of people believe that to be the reason is just as implausible as it actually being the reason - either way it makes no sense and we just have to suspend disbelief.)