The Pakleds weren’t as dumb as they pretended.

Yeah Lower Decks played on their stupidity. But everything about Lower Decks was an exaggerated form of cannon.

But the actual behaviour of the Pakleds was to mislead people into thinking they were harmless through playing on their own stupidity.

Now I’m not saying they were a smart race comparable to (for example) the Romulans. But they weren’t as stupid as they portrayed themselves.