"If it's battle prowess then there are far better options"
Besides from being the alpha, his ability to reproduce stuff should be pretty helpful in a post-apocalyptic society
And canned peaches? deep-fried tiger shrimps? I know it's fantasy, but those things wouldn't be present after 5 years. Agriculture much?
I've never seen a manga where they drank from a glass cup. They're so far removed from reality.