And at Infantry Battalion, the Bn needs to perform at Infanteering. If you can't, you need to get moved into other roles.
Our RSMs, regardless of age, are there to worry about discipline, duties, drills, dress, and deportment. This is a leadership position above all else. Their expertise is in soldiering skills. For most soldiering skills, whether they are done in a crap state or an excellent state, it comes down to discipline, and discipline starts to degrade when you're cold, tired, dragged out, physically exhausted, etc. All things that being physically fit helps you endure and remain disciplined.
Imagine being the cold, wet, tired, and pissed off MCpl who just gets hauled aside for a personal conversation with the Pl 2IC because your section's defensive position is a mess. The cam and concealment hasn't been changed in 4 days, the range cards are done incorrectly, the fields of fire are cleared in a half-assed manner, and your troops are spending more time sleeping than improving the position. In that moment, how much do you care that the Pl 2IC has been digging trenches since you were in high school? The truth is, you don't give a rats ass. All you care about is whether your Pl 2IC can back up his words right now.
If he is the Pl 2IC who continuously dodges out of PT, and when he doesn't he falls out before the Pl is out of the parking lot, but yet can always be found between the unit canteen and the smoke pit, he is not going to have the credibility to correct your work and keep you honest / disciplined.
If he is the Pl 2IC who is always present at PT, who despite his years of experience seems to still give a fuck on a daily basis and manages to stay with the Pl for the entirety of that run despite that stupid Officer's marathon legs, and you genuinely respect him and find him a credible person, he is going to have the credibility in your mind to correct your work and send you off to do a better job, and you're going to be happy to work harder for him.
This is no different for an RSM inspecting CSM's coy position for effective soldiering skills, or a CSM inspecting a Pl 2ICs for the same thing. Or if the RSM is walking around with the CO and inspecting a particular Platoon that day and is speaking directly to the MCpl who's section he determines has a sub-par position due to their lack of discipline.
No one is slagging him or saying that it's not "good on him." But he is being employed in the wrong position / role (in the context we are speaking of now, RSM of an Infantry Battalion) if his physical ability has degraded to the point that he's nearly in a wheelchair.
This is not a matter of me not having enough time to understand how it works. Your last comment sounds very much like "I have lots of experience, thus, you just don't understand yet," one of the more dangerous attitudes in our institution. I am catching exactly what you are pitching, I simply disagree with it, so you can hold back the comments that suggest I am just too inexperienced to understand. Your point is not very complex or hard to grasp.
Apparently not, we just haven't had enough time to grasp it yet. :