I think the flip side of that moclyke is that the CF is not asking for a super human or even a high athletic standard. If I recall correctly, the VO2 max score needed to pass the step test is on the cusp of poor and fair by age group and gender. As I indicated in my previous post, my buddies who have done little physical exercise in years, some of whom are in their late 30s or early 40s managed to achieve the minimum standard in 9 weeks from light/moderate exercise (their routine was essentially 1 set of pushups, situps per day, 5 days a week, + 3 runs a week). The CF isn't asking for much.
Being a soldier in any field carries thepotential, if not the necessity for some trades, to be physically demanding on a moments notice. While waiting for my interview yesterday I was talking to a reservist who had been in A'stan. He was telling me about being woken up in the middle of the night to rocket fire and having to run to a bunker. He wasn't in a combat arms field, but he still needed to be able to run. He still had to carry around his flak armor and tac vest from time to time. He was called upon to do some heavy lifting to help out. None of which was relevent to his trade, but that's life in the army.
The judgement stems from two things, in my opinion:
1) Since the CF isn't asking for much, what does it really say about somebody who isn't willing to invest 6-10 weeks of their own time to be prepared for service? There's no cost involved to the applicant, other than thier time, perhaps 4-6 hours a week. If this person isn't willing to invest 40-60 hours getting ready to do something easy, then what sort of soldier will they be when they're being asked to do something hard or something that's really miserable? I think the men and women in uniform know that answer because they see some of them everyday. The MIR commandos, the whiners, the lay-abouts, the "do the bare minimum" types.
2) A lot of times the people who complain about the PT standard make excuses, e.g. "I don't have enough time to practice pushups" and/or whine about it, e.g "I'm not going combat arms so why should I have to do this?". Again this speaks to character. Does the CF need the whiners who can only see within the context of their trade? Does the CF need people whose default position, the core of their personality is one which breed excuse making?
I don't think ultimately the judgemental nature of what you see is about being able to lift sandbags all day, it is about the type of person who is willing to bleed and sweat a little to be in the CF, and the lack of character of those who don't.