Perhaps intelligent animals are just too well adapted to their world and don't feel the needs we do.

Or perhaps crows only have two claws that also serve as feet and a beak, making it harder to fashion tools?

Perhaps living underwater, like octopuses do, makes it quite hard to master fire?

Or perhaps measuring intelligence is hard, and focusing only on engineering outcomes is a fallacy.

It's also not like most humans would be able to build even a steam engine, let alone a jumbo jet.