It is true if you come from more prestigious private/selective school there greater opportunities available to you as these schools have been there and done that so many times over.The people with all the ECs and leadership opportunities get everything sweet. They bloody get all the scholarships and interships throughout university, then they get all the jobs when they graduate. They bloody get paid to go to university. UNSW Co op $15 000 a year for going to university, I bloody want that. Get into Co op and you are basically set for life, Co op becomes your EC. Unfortunately, they always go to some snob private school kids, the rich helping the rich :|. Man, this is bullshit! All because some tossers in Human Resources seem to think that people with ECs are SO MUCH better. I work my ass off at university and I get stuff all, no scholarships and it will be very difficult for me to get a job (even though I have pretty good marks and know the material well).
Like you I went to a school where students are "good with there hands" so they school never dealt with these sort of opportunities for students.
Once I went to Uni its was like WTF these stuff exists and you just learn its too late for that now. So you might as well make the most of it while you at Uni. But even then some people travel so far to Uni and have such long hours its really just not possible.
Anyways as a graduate you really have little to no practical skills to offer employers. So they'll rather train someone who is better looking and more "worldly" than someone whos not. Can you blame them?