Yeah they were. And he has one of the best line drive hit tools in the game. If he is elevating the ball now(like he did in the 2nd half) then he is going to put up monster numbers.
Again, I think pretty much everyone has acknowledged that it's possible Freeman has taken a step forward and becomes one of the best hitters in baseball. But one of the best hitters of all-time with a BABIP even higher than it had been (which, as you said, came from being one of the best line-drive hitters in the game)? That's where people assume his 2nd half numbers are probably unsustainable at exactly that level.
I said this already, but you would also have to basically assume his 1st half numbers were also legit, meaning he took a step back before taking a ridiculously huge step forward.