In Reply To:
"
for any aging, female or weaker (aka strength or strength endurance limited) athlete"
Did you just lump together weaklings, old people, and women? ;-)
"it is simply the easiest legal way to boost performance"
Which performance metric? All of them? Speed? Endurance? Or just strength?
"and health (by avoiding overuse injuries)"
Are you saying lifting weights won't cause overuse injuries like endurance training will? If so, I beg to differ.
"Sure younger, male athletes with naturally high testosterone levels don't profit that much and maybe some "supplementation" is as effective, but I would rather give up cycling and swimming than lifting"
But does your theory of health and fitness align with the OP?
ad 1: The point is, people with lower natural testosterone gaining more from lifting (as natural muscle loss is not an issue for people (young males) with high t-levels)
ad 2: I like olympic lifting training, so speed (explosive), flexibility and strength.
ad 3: Yep, if you do good exercises (not the smith machine with eleveted heels crap) in good form, this avoids injuries by ensuring a balanced muscle development - swimming for the upper body alone is not very balanced. Strength training alone of course also leads to injuries, but adding 2*60 minutes of strength (balanced, good exercise selection) can IMHO help avoiding overuse injuries.
ad 4: I think so, I consider lifting more important for women and I think most athletes profit from it. And last not least it is very time efficient. If I have only a few hours to train, with 2*60 minutes per week you can still improve strength, speed, flexibility, and avoid the loss of muscle mass.