This is a fundamental misunderstanding of the rehab process.
You have oversimplified it for absolutely no reason. They shan't have 'just got him to do some exercises'. Depending on the stage of rehab, intro plyos and landing mechanics testing are fundamental components of the return to play process. Also, with Doueihi, if an ACL is suspected as 'possible or probable', he's immediately off the field. People have finished games with ruptured ACLs.
This was a ridiculous comment about 2 situations you have absolutely no idea about.
Very silly, Happy.