A starter is only DME and no hops run at temperatures good for the yeast but bad for making beer. I hear that a lot do drink the starter beer. I am not one of them! Warm flat low ABV non hopped "beer" is not what I would like.
With my shaken not stirred starters, while not a balanced product, the starter beer is fine.
If it ever smells off or taste off I don't use it, why would I want that in my beer?