Sanjay's argument for why young healthy people should get vaxxed was to prevent the spread of the virus. If this study is correct, there is no reason for young and healthy (emphasis on healthy) children to get vaxxed. This is the reason you are apparently impervious to.
Also from Sanjay, we won't know the long term effects of the virus until the passage of time. So, again, it's extremely low risk vs unknown risk. A responsible parent will always choose the former in that scenario.