And if there’s no facility to buy an individual drill bit? If you want the one you don’t have, you cough up the cash for the whole packet. If you can make do without, you don’t. It’s not rocket science, and it’s a marketing ploy that’s used the world over for many different products.
As for buying a second licence, that’s nonsense - buy the upgrade pack instead. It’s cheaper, for starters! Given that the sim has been free to use on Game Pass since it launched, I felt the upgrade price (especially during the same) was extremely reasonable in the circumstances.
Each to their own I suppose!