why does nobody say can white be in a zugzwang from move 1
To say that, one will have to calculate all possibilities. Otherwise, it's just speculation, and from a practical point of view, not a reasonable one: everyone feels more comfortable with the white pieces and vice-versa. With white, one gets an easier game, at least up to a point.
Well if the truth lasts forever than The Holy Bible lasts forever. It says so that The Holy Bible is the truth!
The Bible certainly doesn't last forever: in a huge-enough catastrophy all books may be destroyed.
Also, saying something is the truth doesn't make it so.