I hear what you're saying - but they are now in a world where very few celebrities do their own work. They ALL have minions doing it for them, you just don't get to hear about it normally.
Unless you have a career as an actor or musician, can you name a single person who has fame and fortune and who DOESN'T have an entire machine behind them? That's what the WME's of the world are paid for. MM's comparator is those people. She doesn't feel the need to put in the work, because nobody else does. Indeed, I imagine she feels that WME or Spotify or Netflix have been remiss in their duties to her because they haven't managed to pull a cat out of a hat for her.
It's not a coincidence that they're pally with the Kardashians: the family became famous because of a sex tape! There's no earned kudos. And the machine (which they were able to access because of deep Hollywood connections) behind them is enormous. Meghan Markle is a parvenu: she arrived 3 or 4 years ago, with no talent, and a husband who used to have a machine behind him but which they spurned.
As for being multi-millionaires: you're looking down to compare. They look up. By Montecito standards, they're "poor". It's like moving to, say, Kensington and living in a 3-bed apartment on a busy road with no parking, trying to keep up with the Beckhams who not only have a gorgeous detached house with staff and parking at the better end of the neighbourhood, but also a massive house in the Cotswolds and LA and a yacht in Miami.
Literally all they have going for them is the connection to the RF that they derided, but they want to run with the richer set.