Tolkien, Lewis, Rowling (her books are decent kid's lit), Riordan (the original Percy Jackson series was decent), Rothfuss (who killed the Bestseller List with The Wise Man's Fear,) Sanderson (The Stormlight Archive sells gangbusters based mostly on word-of-mouth promotion)... the list goes on.Complete bullshit. How many times do legitimately good books actually make best-seller lists or become well-known series', let alone get television or movie deals? That shit is 100% nepotism.
"It's impossible to have a good book/film/game/etc. sell well without nepotism!" is the battle-cry of creatives with an inflated sense of their own talent.