Not at all.
In a vacuum, two weeks from now is better. However, concussion symptoms can last a few days to months, or even years.
Bobby reported that Arch's concussion was considered "slight." However, the risk of re-injury is always higher following a first concussion, with risk compounding with each occurrence of TBI thereafter - especially so if the trauma occurs soon after a preceding concussion.
Therefore, while diagnostic symptoms might subside, risk does not. This is why I am saying it is more nuanced than simply passing RTP protocols. Passing protocol ≠ an elimination of risk, or even an absence of elevated risk. No matter what, if Arch plays Saturday, he has both a heightened risk of re-injury, as well as a heightened risk of greater injury. I certainly to not have access to Arch's medical record, his real-time progress, symptoms, etc. However, doctors clearing him does not do anything to the fact that he will be at elevated risk if he plays this Saturday. They're simply clearing him based on formulaic symptom existence/the lack thereof.
Accordingly, I don't believe he'll be at his best regardless of what Texas' doctors say. He'll likely be tentative, less mobile, and potentially neurologically delayed (even if it's imperceptible outside of game-time conditions). It's likely that Texas will have a sub-optimal version of Arch if he plays, which I why I personally believe they should start Caldwell and see what happens. Not to mention the elevated risk factors I laid out above.