This objection is the well known Chinese Room Experiment objection[1].
The issue is that there doesn't seem to be a better alternative.
Either we build intelligence tests that some variety of the Chinese Room experiment will pass, or
* We have to consider that humans aren't intelligent by our own definitions (or rarely so).
* We decide intelligence isn't actually a scientific attribute and is more akin to a religious attribute, so we abandon the idea of being able to test if something is intelligent.
The issue is that there doesn't seem to be a better alternative.
Either we build intelligence tests that some variety of the Chinese Room experiment will pass, or
* We have to consider that humans aren't intelligent by our own definitions (or rarely so).
* We decide intelligence isn't actually a scientific attribute and is more akin to a religious attribute, so we abandon the idea of being able to test if something is intelligent.
[1] https://plato.stanford.edu/entries/chinese-room/