Don't get me started, OP!!
As others have said, it's incredibly annoying but very hard to put a stop to. I remember reading an article in the Radio Times inviting us all to celebrate the fact that Esther Rantzen's daughter had been given her own show on radio. Ditto John Peel's son (this was some years ago!). Don't they feel any embarrassment at the blatant nepotism?? Clearly not. I'm always very cynical about second generation media stars - although I admit that David and Jonathan Dimbleby are very good at their jobs - if extremely smug.
So many 'glamorous' jobs are effectively closed to ordinary mortals. I've often heard or read interviews with such people who've been asked how they got into their job and they say "Oh, I was a dinner party and just happened to sit next to Big Cheese, who said "Come and do such-and-such a job", and it all started from there." Well, yes, it would, wouldn't it???
They seem totally unaware of their privilege in having the right contacts. Actors whose parents are in the business will say "Yes, it got doors opened for me, but then you have to prove yourself." But most people just need the door opening, and then they'd be fine - but that won't happen.
I've always worked in museums and galleries, and strange but true, jobs in these areas are much sought-after. You need work experience to get them, though, (a bit like actors and the Equity card). I know that at a very prestigious national museum, children of staff are not allowed to do work experience there, which I think is admirable. Shame the media don't work in the same way. (Before anyone says that's unfair on the kids - they are free to apply elsewhere like anyone else, just not where mum or dad works.)
Sometimes the kids are brilliant - but they still got the entree through privilege. I remember one of Benedict Cumberbatch's contemporaries at Manchester university said that, while BC was a lovely chap and very down to eartch, at their final production as drama students his parents had invited 6 theatrical agents along! Most other parents weren't in that position.
I try not to think about this kind of privilege/nepotism because it just makes me gnash my teeth. It's always been so and I just don't know how you could stop it happening - people will always find a way to push their own children.