A follow on question from Is drawing an arrow from a quiver an item interaction?, using throwing darts. This time I have, let's say, a level 1 Dex-based Fighter who has two shortswords and darts. He duel wields, but there's an enemy that's just out of melee range, even after closing the gap with his movement, so he wants to throw a dart at them.
Can he sheath one sword, then throw the dart as his Attack Action without needing another Action to draw the darts (let's assume they're not buried in a backpack but instead strapped to the outside of his leather armour or something, in other words they're easily accessible like arrows in a quiver). Again, I'm ignoring the "drop the sword" option for this hypothetical situation.
This, to my mind, is similar enough to drawing an arrow from a quiver, so given that the answer to my first question is that drawing arrows doesn't count as an item interaction, would the darts example also avoid requiring an item interaction, and if not, why not?