I think this is two-fold:
1) You have a better strength base in the required areas
2) You have better coordination with moving your body around a barbell.
I've seen people who are predominantly machine based trainees try to learn simple lifting tasks and battle. They lack the skill base, and probably some strength base, in order to complete the lifts correctly.
So I think for the guys here we could both agree that they should all have a go at the power versions of the weightlifting lifts. Maybe watch a couple of vids first to get an idea of what they are meant to be doing so they can step themselves through (like you would learning other lifts).