Understanding ってだけで in this sentence


Dad suspects that his daughter's good looking teacher might not be as popular
as everyone thinks. When asked why, he responds:

> Dad:「とかく美人はなんやかんや言われるからなァ」  
>  Because various things are said about beautiful women  
>  Mum:「そうね。美人 **ってだけで** 生意気だなんて言われたりね」  
>  That's right. It's said that _only_ beautiful women are cheeky.

Dad then seems to get angry and asks mum how she would know such a thing.

I think my translation of mum's sentence must be wrong. I'm not understanding
the 美人ってだけで part. At first I assumed this was equivalent to 美人はだけで. But I
think if you use は and だけ together then it must be だけは and not はだけ, so I guess
the same is true with って?

Irrespective of that I don't see how translating だけ as 'only' makes any sense
here. Nor, why dad would get angry at the comment.




美人ってだけで means 美人というだけで、美人という理由だけで. So it is translated as " It's said that
beautiful women are cheeky simply because they are beautiful."




美人ってだけで means 美人というだけで、美人という理由だけで. So it is translated as " It's said that
beautiful women are cheeky simply because they are beautiful."

