Your "evidence" was a video showing what a nollie is and everybody knows what a nollie is, but you have yet to provide evidence of why it is a trick, so you are left with two options:
1. provide evidence or an argument of why a nollie is a trick
or
2. agree to disagree and stop being a stubborn little kid
Also, the name came from skateboarding, and yes when skateboarding it is harder to nollie than ollie, but when you are skiing your skis are attached to your feet making an ollie, a nollie, or just a straight off the ground pop the same level of difficulty, like zero difficulty.