You should look up Dunning Kruger. I think you mean well and I'm sorry others are hard on you. But some of them on here have been working on cars for a lot longer time. I also go my degree in electrical engineering so some of your statements don't make sense because you're making assumptions about how the engineering was done. You can design a switch to last 100,000 times or 1,000,000 times or more. Just depends what costs and constraints your have in the design. Basically a push button is a different switch than one that you turn. They don't automatically have the same life but it could be true on the Toyotas that you work on, other makes could be different. The button failing on a Mercedes is not common although the electronic ignition system does fail, but that's more of an electronic/chip fault rather than the switch wearing out.