Not sure how naive this question is, but Alec Baldwin once wrote to his brothers who were not in film yet and said something like ‘the streets of hollywood are paved with gold for handsome men’, and all the Baldwin brothers did fairly well in LA.
Now you have the Hemsworth brothers who are doing fairly well.
However I’m going to assume being good looking alone isn’t enough to get by (I’m sure the connections the one successful brother developed opened the door for the others in the above situations). Plus when you consider how many extremely attractive people end up doing porn, I’m sure they would do something more lucrative if the option was there.
So I’m guessing no (I’m going to assume astonishingly beautiful people, the 99.9th percentile and above, are a dime a dozen there, and you also need luck and connections), but what do I know.