I used to think this for many reasons people have already discussed within this thread... but then i got a look at a PUP wearing 5/5 usukane and pretty unbelievable gear in general...
I can't remember which frame he was using, but he was outparsing the gimpy SAM and WAR nearly combined when combining the PUP and pet.
This was the first and last time i saw a good PUP in action....
It all boils down to specializing in the job, you can have a billion 75's and almost always someone has 1 specific favorite that they care about more than others.
And if you look at it that way... how many people would actually choose PUP to specialize in?
If you dont specialize in PUP and take it beyond it's limits... you'll always be the "lolPUP"