You need to understand the worldbuilding context here to see why the ML did what he did. Even though the MC is an omega, he chose to keep participating in sports while being surrounded by alphas. If the ML hadn’t covered him with his scent, by this point the MC would have already been taken advantage of by another alpha. That’s how the omegaverse world works, at least from what has been shown so far, so you can’t really blame the ML for wanting to protect him from other alphas.
