People like to act like everything is organic with Kendrick but they don't like to admit that dude was also the biggest rapper over at Interscope after Eminem, and they're the main ones who created this concept of these mega albums full of super producers, big collabs, and expensive samples, and huge marketing campaigns.
Like we've seen how stacked albums like Get Rich or Die Tryin, The Massacre, The Documentary, and Em's albums were. And we've heard countless times how much Dre and his team was involved in mentorship and actually directing these albums from song selection + sequencing to how to lay down vocals. Kendrick's first album had Just Blaze, Dr. Dre, Pharrell, T-Minus, MJB, Drake, etc. It's easy to sound much deeper or artistic than you really are when you're rapping over a Marvin Gaye sample, and not every artist is going to have access to that.
They also have a strong distribution team and you see it with the heavy playlisting their artists get on DSPs or how their artists continued to be covered by blogs even when they aren't active. XXL admitted in the past that they were pretty much in a deal to exclusively promote Interscope artists in the past. This is why you'll see Eminem and Kendrick regularly in shyt like Rap Caviar when we know the audience for a playlist like that doesn't care about music from those two guys.