1920 letter?... No credibility.
G I Jane movie, 1997 a little more credible.
Physical ability required of the MOS a little more credible in 2025.
One doesn’t need super-strength to be a computer screen jockey . But they still need to be healthy, mentally alert. The biggest de-qualifier is alcohol and drugs.
Even in Vietnam alcohol and drugs were a bigger problem than physical strength. But strength was needed for most, but not all MOS.
The fallacy of the left’s strawman argument is that every MOS, like, for instance, drone pilot, doesn’t “need” to be physically fit.
The right answer is, every armed serviceman SHOULD be fit enough to serve, anywhere needed, at any time needed, and fight if necessary. History is replete with examples of so-called rear echelon troops being called upon to fight in emergent circumstances.
For every marshmallow soyboy soldier, we could and hopefully will have a FIT soldier eager to do the same job and fill the position well. Build a credible force, lead it well, make service tough and honorable again and we won’t have any problem attracting the right kinds of recruits. If we build it, they will come. Thus it has ever been.