What? How is letting go of an object and dropping an object not the same thing? Either you can do it as a free action or you don't!
You're jumping back and forth between real-life logic and rules. Which is fine, I am too, but you're just simply doing it
backwards from what the RAW means for you to.
When you're personally intentionally acting, it is generally your turn. When someone else is acting it is their turn. If they take something from you, it is covered by THEIR object interaction. It is not part of your action economy if you need to roll a saving throw to try to stop them, nor is it part of your action economy if you choose to let them take it.
It is the same thing in a sense that you need to keep track of whether you have the weapon with you or not. Which I really do not think is particularly arduous in either case.
I mean, I've explained why I don't like it much (it's not a big deal either way) and so has
@Charlaquin. To reiterate - though I wish I didn't have to - it's because people sometimes
forget that they dropped it (this would be similar to your example if they
just kept throwing axes well beyond the number of axes they actually have) and draw it again, or attack with it again, sometimes resulting in a backtrack of a turn, if someone points it out. The "where did I leave it" part is secondary, but still important when you want to use it again (more important than where your thrown weapons are left, which can normally be totally forgotten and dealt with with "I go pick them up" after combat is over).
I mean, then they allow those things. That's what the poor wording does for the rules. And even for a houserule or an errata, there ideally should be a consistent wording that wouldn't allow these exploits, but would still allow rapid weapon swapping, (assuming that was a desired feature.)
Again, we don't really know what the rules are yet - we know what some rules are, and people have been making fun of those rules, often using rules that no longer exist to make the new rules sound "more confusing" than they actually are.
Don't get me wrong - I think that a few of the new rules are poorly worded! But they're often not as "bad" as claimed, when people are mushing them together with assumptions that are wrong.