This is a tired destructive view of life. Aversion to suffering would work just as well, as in, accomplishing goals at your convenience without suffering...
This is a helpful message from Pope to the religious of the time because it's likely they don't understand what's truly just. In this time, the objectively minded can't afford to be silent.
Common sense tells you, respecting the individual is all about dictating what must absolutely be avoided in limited sense to preserve the social contract, not dictating social particularities.
This is fairly complex. I do think it's true. We can't reliably capture what I think of as the qualitative foundations of life. We capture it by compiling particulars.
At face value this leaves room for relativism. You could set any standard and call the outputs "good". Meeting functional goals that preserve life in general are "good".
I think it's important to add that we can become wise by the knowledge of other men, as well as learn from the mistakes of other men. The intelligent will do that. The not so intelligent will unknowingly wait for it to happen to them.
