Apple routinely has 90%+ of the laptop marketshare for computers that cost $1,000 or more. Seems weird to compare their marketshare to markets they're not competing in.

How does that say anything except that Apple laptops are so expensive that for anything they don't need Apple for they don't have to spend $1k?

Apple laptops are not invisible or unknown to buyers, and customers overwhelmingly choose non-Apple laptops, as shown by the sales numbers. I don't get what we're disagreeing over. Or is it the case that secretly everyone wants to purchase Apple products but they just don't have the money?