Sounds like you got some good advice. They know a lot about concussions but are still over-stating some of their claims. "He told me I will recover 100%" If you read their research, they admit that they do not have systems to measure recovery to the 100% level. Since their goal is Return to Play, this may be what they mean by 100% recovery. Even then, they also admit that they can not measure and predict if the brain ever recovers to its pre-concussion level of tolerance for another impact.

So, follow their instruction but remember to protect your brain from further impacts.