@Omninboy indeed. Even the MC was weak and fat but thanks to the barrier, he was able to kill the monsters without getting harmed fairly easily and level up super fast because of that. Not to mention, The Sage himself (that was just like the MC) was literally offered to become a God by the Gods. Also, if I level up, I should get to a Metamorphosis state and all the impurities and stuff of my body should get removed, just like how the MC became super fit and handsome overnight. Let's also not forget that I can still go out and hunt and level up more and not just once and get the OP equipment that The Sage left behind all for myself.