Why am I being downvoted for exactly quoting apple marketing from the past?

Value on a few parameters ( these are relative of course) : - Stability - Security - Ease of use - Looks I’m sure the millions of users have found a combination of these factors valuable

Perceived value? If their customers value their products at $X and value their competitors less, they should pay more for Apple than their competitors. Some of this is subjective (branding, UX, etc), other parts have to do with the value add of combining multiple Apple products into one ecosystem (macOS + iOS is more valuable if you use the shared ecosystem).

Is it worth spending $1-3k on a Mac if you just want to browse the web? Probably not unless you're really into their branding. Is it worth it if you have an iPhone, iPad, and Apple Watch and use many of Apple's shared services? Probably, and you get even more value out if it if you use popular software that targets macOS like Adobe products. If you're buying the ecosystem, the price is a lot more justifiable.

Personally, I don't own any Apple devices and I primarily use Linux, so my only one case for macOS is the iOS simulator and XCode so I can build and do basic tests for apps on that platform. And honestly, since that's the only extra value I'd get from them, their hardware seems a bit overpriced (I'm already paying for the developer license and sharing profits, hardware costs and lack of selection are salt in the wound compared to Android).

Economic value = maximum amount a customer is willing to pay for something. It does not matter why. Usually economic value is little higher than market value.