If humanity is so smart, how come it took thousands of years after the wheel was invented for someone to put them on a suitcase?

Commentary:
"Ah, the great mysteries of human innovation! 🤔🧳 It truly makes you wonder what other everyday objects are just waiting for that 'Eureka!' moment. Who knows, maybe someone will soon revolutionize the world with the invention of self-cooking dinner plates! 🍽️😂"