On the fence here.
On the one had, I get a bit irked that people who are related to someone famous, get a back-door in, a leg up, or whatever you want to call it, as it seems very unfair on people who are not fortunate enough to know - or be related to - someone famous.
On the other hand, it's understandable that they want to be in the business, as they have grown up in a family who is in it, and they sometimes do have talent - not always, but sometimes.
If I was related to someone famous, and I wanted to be in TV or in a TV programme or film, and the makers of the show/film offered me a chance based on my famous uncle or cousin or whatever, I wouldn't think 'oh I won't take it because other people - who are not in the industry already - have worked so hard to make it.' I would jump at the chance.
There is also the other side of the coin. When someone is very famous, respected, successful etc, with an illustrious career; their offspring or siblings are expected to make it too, and be as good. And if they're not, they get lambasted for not only being mediocre, but also for 'living off their famous relative's name!' Must be hard for someone to live in the shadow of their famous relative(s.)
It's still hard to have tolerance for people (related to famous people,) who seem to have a relatively successful career, when they have no talent at ALL, and nothing whatsoever to offer (like Kelly and Jack Osborne, the Kardashians, and Nicole Richie, Paris Hilton, the Beckhams children, etc,) when there are genuinely talented, hard-working people who never ever get a break, and probably never will.
Another thing that boils my piss, is this suggestion that Kylie fucking Jenner is the youngest self-made billionaire. No she fucking isn't! She rode on the coat tails of her family, and used their money to advance her 'career.' Just fuck off with this 'youngest ever self made billionaire'^ bollocks.
As for Lily Allen. She is OK, but not particularly very talented. A bit average IMO. She would never have made it without having a famous father (and stepfather,) not in a million years.
Even Stella McCartney is pretty talented, but I still feel she would never have made it if she had not had a hugely famous father.
Angelina Jolie, Sean Pertwee, Charlie Sheen, and the Fondas, and the Redgraves and Richardsons etc would all probably have made it anyway, but some people would never have made it without their famous connections. Willow and Jayden Smith are examples of those who no-one would give the time of day if they weren't Will Smith's children. They have zero talent.
I think the people who DO have a famous relative will do well if they are genuinely talented. But the ones who have nothing to offer, will become mildly famous, but won't have much of a career, (or last long in it,) if they are talentless. They will just end up on reality TV.