Earlier quoted context omitted.
> I never have back pain, but when I do, its because I'm carrying a heavy laptop around on my back. Just how heavy is your laptop? You need a better backpack I think? I regularly carry 10kg of groceries in my backpack over two kilometers. It never gave me any back pain.
It will. Just give it 10 years.
Carrying a heavy backpack can be practiced. It does not hurt your back.