I understand that, but that's actually wrong. You can do just as much damage stabbing someone with a dart as you can with throwing it. Also l, a dart does not count as or use ammunition. Those are 2 distinct qualities of real ranged weapons. You can make the argument that darts are in the ranged category because in 99% of the use case, they are thrown, but that shouldn't be the defining factor.What @ccs said.
Darts are absolutely not melee weapons. They’re literally under the heading “simple ranged weapons” on the weapons table. If they did not have the Finesse property, you would not be able to use Strength to attack with them because they are not melee weapons with the thrown property. They are ranged weapons with the thrown property.