we use language in different contexts. In the food store “fruit” has one meaning, while in a botany paper, it has another.
This doesn’t say theres no such thing as fish generally, it says there is no useful definition for it in a biological setting.
Also intelligence isn’t some all encompassing thing. Just because you are a good learner or have superb spatial thinking or whatever else doesn’t mean you are good at planning for shit.
The classic view of intelligence completely misses how different people are, and how many different things intelligence could actually mean.