The question of “overall benefit” of agreements like NAFTA and the TPP is irrelevant.

What is the overall benefit if such things contribute to vast localized poverty and misery while raising GDP? Put that into your cumulative distribution function and smoke it. And what exactly is the benefit if they result indirectly in the election of people like Trump and Le Pen?

When you’re operating on the fundamental assumption that GDP measures something useful in every other sphere of life (well, first, you’re a dumbass) then you can make statements about how “everyone has benefited” while some people enjoy the glorious benefits of being jobless, broke and dead.