I don’t understand. WHY is it legal to create and sell some things that, in turn, are illegal to use?

Today I’m thinking specifically of credit/debit card skimming. The ability to ‘skim’ a card (from up to 10 feet away!) can have no legal purpose so why is it legal to create it?
A friend is in the wrap up phase of fixing the damage: a card that the friend had never used, had bought only as an emergency backup while traveling, and which had never left her wallet, had the card skimmed and used in nine different instances literally all over the world

The friend has no idea of how or when the card was accessed. The bank has erased the debt and all is well now, but the damage is done.

There are other examples but this will do for a start. I'm thinking seriously of returning to check-based purchases.