I dont see this MC as dense.
He just doesn't give a shit.
He's one of those types that sets his mind to a goal, in this instance, being a capable adventurer. Things outside that parameter mean nothing to him.
I'm nigh 100% sure that if a quest or promotional exam were to be "lay thine bitches", lay them he would. To the point they couldn't live without him. But, in till that time comes, he'll be cock blocking readers and waifus alike.