However, the top bunk should always have some kind of railing like pictured below. If these bunks didn't have that, then there is no excuse for that.
Bunk beds are really not a good idea.
We had bunk beds as a kid.
I always took the top bunk as my brother wet the bed.................😜
As a kid, mine had a guard-rail on it, except where you entered with the ladder.
My older brother forced me to switch when I wet the bed.
Problem solved.
However, the top bunk should always have some kind of railing like pictured below. If these bunks didn't have that, then there is no excuse for that.