So your assertion is that EVERY person with a real concussion MUST be in a dark room for two weeks post concussion, or they didn't have a concussion? That's laughable. It's false... like ridiculously false.
A person with a first-time concussion typically recovers fully within a few days to weeks after the injury. No two concussions are the same. This means that recovery is different for everyone.
The Living Concussion Guidelines was developed to improve patient care by creating a framework that can be implemented by healthcare professionals to effectively identify and treat individuals with persistent symptoms following a concussion/mTBI.
Please read the details at the link and learn... I'm Level 3 coaching certified in two sports, with concussion training from Sport Canada.