Shatter Defenses...with Weapons w / o WF

[Rerednaw]

I've been toying with Slayer build (melee and ranged) and was reading the Shatter Defenses feat.

PRD:

Shatter Defenses (Combat)
Your skill with your chosen weapon leaves opponents unable to defend themselves if you strike them when their defenses are already compromised.
Prerequisites: Weapon Focus, Dazzling Display, base attack bonus +6, proficiency with weapon.
Benefit: Any shaken, frightened, or panicked opponent hit by you this round is flat-footed to your attacks until the end of your next turn. This includes any additional attacks you make this round.

Seems pretty straightforward, hit a feared (shaken not stirred/frightened/panicked) foe with a weapon your proficient with and they are treated as flat-footed.

While you have to be proficient with the weapon...it doesn't say that Weapon Focus has to be with that weapon...is that correct?

So a switch-hitter build with say WF: Bow could still get the effect of Shatter Defenses if he found himself in melee with say a club, that's he proficient with, but doesn't have Weapon Focus in so long as the target was still under a demoralize or similar effect.

Correct?

[Darksol the Painbringer]

RAW, that's how it would work.

RAI, I'm pretty sure the assumption is that the effect only works if you make attacks with a weapon you've selected with Weapon Focus.

That being said, if the situation (if I'm correct) is you're improvising your Bow as a melee weapon, the weapon being used is still a Bow, meaning Weapon Focus, and therefore Shatter Defenses, would still apply.