> I can get a PC that out-performs the Mac for a-half-to-a-third of the price
So? Can you legitimately run macOS on that PC? The OS is what makes a Mac a Mac, and I would guess is the main reason why people choose to buy a Mac over a Windows/Linux PC.
If everybody was like you and cared only about hardware specs and purchase price, then nobody would buy Macs. However, many people realise that the software and OS running on that hardware is where the value lies, and for those people who prefer macOS, the extra cost is worth it.
(Macs typically have a longer usable life than Windows PCs, and have higher re-sale value, so that also helps to offset the higher purchase price).