I'm astonished how many commenters are desperately trying to find loopholes in simple laws of physics.
I (and most of the other commenters here it seems) keep trying to communicate that it is possible to be both technically correct and simultaneously not useful as a weight loss strategy.
It wont work for everyone though, since many people can't make themselves eat less without following some rituals, the problem there isn't CICO but that those people can't implement a CICO diet properly. But that doesn't mean that CICO is a useless concept for losing weight, it just means that those people needs more help to keep their psychology in check.
Saying that CICO isn't useful when CICO is the basis for every single weightless diet in existence is just ignorance or a lie. All weightless diets either makes you absorb less calories by some method, or make you burn more calories, so the first thing when looking at a diet is asking how it relates to CICO. Trying to sweep that under the rug as some old school nonsense principle that has proven to not work just proves how much nonsense there is in nutritional "science".
Knowing what mechanisms and processees go into losing weight can make the journey much more intellectually stimulating, satsifying for the participant and smooth out incredibly rough bumps in the road to losing weight. CICO can't fill this need for tailoring weight loss to smooth out the efficiency losses you get with brutal cuts into one's life and psyche.
Pumping out a single metric and hammering flat all the differences in personal process with psychology and ritual screams of unnecessary suffering. It's probably wrong to use oneself like that.
Very few people live according to the physics based description of what their life should be... However one would derive that idea without hiding or ignoring personal presuppositions?
If you're simply referring to the physics of CICO that underpin most diets then I have already acknowledged it is correct.
But being correct does not make it necessary knowledge for people looking to lose weight any more than Hamiltonian mechanics is necessary knowledge to play tennis.
If I still haven't managed to convey the distinction between technical correctness and practical utility yet then I have to conclude this is a gap I cannot bridge and I wish you luck.