PC's can be cheaper. They can be more expensive than a used car. They can run the most demanding games, they can run games from the 80s or 90s. They can run emulators of other machines, they can do basically anything.
No one is honestly saying that the reason PC's are better than consoles is because they are cheaper. Maybe over time, since technically my PC will outlast the current console generation without needing much of an upgrade. And the pure discounts on PC games versus console games could save you a buck. But overall, the reason PC's are better is because there's more to them, you're not locking yourself down to a company's digital store, you're not locking yourself down to one company's peripherals, etc.