My two cents:
To me being a deserving soldier isn't about what trade you're in, how much action you've seen, how fit you are or even what training you've been put through. It is entirely about how much effort and initiative you put forth, your constant will to learn and listen and improve, and where your mind is in general. Approaching situations like an adult. Working with others and not against them. Jumping apon any opportunity possible to hone your skills. And of course it's about the same theories beaten into all of us during SQ. Duty, Honor, Integrity, DISCIPLINE.
I've seen people of all trades in action. I've met some pretty worthless CBT Arms types who are in good shape and have even reached MCpl, but are either very lazy or otherwise borderline-retarded. Example being, me and a peer lifted upwards of 50 sandbags back and forth while a bunch of Inf NCOs sat around laughing with their thumbs up their rear and literally doing NOTHING to help us until I pleaded for it - no joke.
I've seen Maintainers, RMS and Sup Techs who FAIL to even drive themselves to any acceptable standard, or who treat the trade as if it's a 9 to 5 and dont see how important it can be to the person you've working for when you take the extra mile to help them or otherwise do your job that much better. And I have met very good CSS troops who weren't even remusters from CBT Arms but could keep up with them in more ways than one. Would you beleive that the best candidate on SQ was a VTech when it was overwhelmingly CBT arms candidates? Of course, there's many good CBT Arms types as well, and those four trades deserve respect for the training they're put through and the dangers thrown at them.
It's in anyone's potential to be a terrific solider, and it's as simple as this - you get what you put in. So, granted, CSS troops don't get the chance as often to hone their skills like some others do. The only way to work against this is in the meantime, show up for as much field exes and weapons exes as you can, and make it clear to your COC that you take your green undershirt that seriously. That's what I do, and it helps. I do think we should put more focus on solidering in a lot of trades, especially mine, because to me honing marksmaship is more important than standing at your bed heels-together every morning and being expected to care how your thsirts are folded or whether your socks are happy :
and somehow I wound up doing more of the latter than anything even remotely soldier related... but such is life, and we gotta work with what we have.
At the end of the day, what you rather have in charge of you -
A) a guy who isn't in super shape and doesn't work a very 'hardcore' trade but is intelligent, mature, disciplined, works hard and knows a thing or two about organizational skills and a soldier's ethos OR
B) your stereotypical rambo-wannabe who is near olympic, has para wings and all but lacks what the former has inspades.
It's not all about guts and muscle. And none ofthe above even remotely depends on your MOC at all.