He served well as the player avatar in a game that was designed with VR in mind. So he was supposed to be a nobody and he served that purpose well - knowing his face like the image in the OP diminishes this.
He has no green beret training, no armed/hand-to-hand combat experience, no noteworthy background, which is a stark contrast to the superheroes that the series has pumped out and reached its peak in RE6. Ethan can't to flying kicks or suplexes to the undead. RE7 was seemingly not about power fantasy (although towards the end of the game it was yet another total power fantasy). Of course, for those who wanted to play as superhuman being like the previous RE games, Not a Hero and End of Zoe DLCs were there, and they were fantastic.
That said, as others have pointed out here, while he is supposed to be an everyday person... early in the game his hand is cut off, stapled back together, and is totally fine with it. This could mean only one thing - Ethan is yet another B.O.W.. Anyone who follows RE knows that the real B.O.W.s in are Chris, Jill, Leon, Claire, Wesker, Ada... should add Ethan to the list. Mr. X. and Nemesis have nothing on those monsters.