BECAUSE ONE OF THEM IS FUNCTIONALLY MINIMAL JEWELLERY AND THE OTHER ONE IS AN ADVANCED MICROCOMPUTER ON YOUR WRIST WITH A MYRIAD OF FUNCTIONS, SOME OF THEM EVEN POTENTIONALLY LIFE-SAVING.
(Sorry for screaming but it is really annoying that this useless apples-to-oranges „comparison“ still pops up regularly, even over 8 years after the first Apple Watch was released.
(Also, only very few mechanical watches actually hold or even appreciate in value; 99,9% don‘t. And all of them will only „hold up forever“ if they are regularly serviced - which isn‘t cheap, either.)
(Disclaimer: I do own a few mechanicals myself. If I calulate $/€ per hour worn, my Apple Watches come out as way cheaper.)