Striker proficiency and throwing starknives

[Squiggit]

The striker subclass trades its expert proficiency with guns for expert proficiency with melee agile/finesse weapons specifically.

The thrown trait says that a weapon with the trait is "a ranged weapon when thrown."

So if a Striker with a starknife throws their weapon, do they use their expert proficiency because the item itself is a one-handed martial melee weapon with the agile and/or finesse trait, or their trained proficiency because the act of throwing it makes it temporarily a ranged weapon?

[Baarogue]

That's a tough one. They really do specify melee quite emphatically. So I guess it falls down to, are they trained in the weapon or the method of use? I think I would allow them to use their expert prof in the weapon even for throws but I would not argue with any GM ruling the other way and could potentially be convinced to do so myself if an exploit were presented