Legitimate use: ordering from an online pharmacy, something that that is legal in your own country, and legal in the source country, but not legal (or just prescription-only) in the US, so there are all sorts of import restrictions every other country enforces for the US’s sake just in order to avoid being party to transshipment to the US.

(And, usually, you have to buy such things with cryptocurrency, too, even though they’re perfectly legal both for you to buy and for them to sell; the product’s scheduled status in the US translates to no payment processor [all US-based] being willing to work with the supplier.)

Try buying e.g. Russian-produced pharmaceuticals from Canada without Tor; I’ll wait :)