Horses and donkeys have a lot in common. They both carry people and people’s burdens. They look like genetic cousins (both genus: equus) and can produce hybrid offspring.
But horses seem beautiful and majestic; donkeys not so much. You picture John Wayne galloping across the prairie on a magnificent stallion, rescuing runaway stagecoaches. You picture Gabby Hayes toodling across the desert on a scruffy donkey. They make movies about horses like Secretariat or The Black Stallion. If they made a movie about a donkey, it would be something like Buttercup the Burro and Her Friend the Magpie. (My suggestion…Hollywood, call me.)