Racial weapon feat question

[Ecliptic12]

Okay, so Goblin Weapon Familiarity is a lvl 1 ancestry fest that lets you treat goblin weapons as simple weapons (or advanced weapons as martial). So, by definition, when you gain proficiency with simple or martial weapons, the goblin weapon proficienciea should increase as well.

However, at level 13 goblins gain access to Goblin Weapon Expertise... Which gives you proficiency with goblin weapons whenever you gain proficiency with ANY weapon.

This seems a little redundant. Is this purely so classes that only have proficiency with a couple weapons (wizard, sorc, etc) can utilize the racial weapons? Or is there more to this? Since the first feat let's you treat the weapons as simple or martial, you shouldn't need the second feat except for a few rare and specific cases?

Thanks

[HammerJack]

That's exactly it. The second feat exists because goblins are allowed to be any class, including alchemists, bards, clerics, druids, monks, rogues, wizards or sorcerors.

Not gaining your proficiency increases to "all simple and martial weapons" isn't a rare edge case.

[Squiggit]

Wizards only get proficiency with a subset of simple weapons, rogues and bards get proficiency with all simple weapons, but only a subset of martial weapon and fighters get accelerated proficiency with one weapon group. Clerics only advance weapon proficiency with the deity's weapon too.

So Goblin Weapon Expertise helps out all those classes (and other classes in the future that might have specific proficiencies too).

It also lets classes that don't normally get MWP leapfrog into advanced weapons.