Definitely but I also think there's something to be said about how much any negative stories about the future king of England and his family would be squashed, if there were any.It is really interesting as it makes Kate seem like the "relatable" and approachable one. And Meghan seems like the high maintenance snob.
We've never heard horror stories from Kate and Will's staff yet there are many about Meghan. Like you said, there's got to be some truth to how difficult she is.
I'm not a fan of the Kate vs Meghan narrative myself, they don't have to like each other just because they married brothers, as far as I'm concerned as long as they're polite and civil, they can do what they want. There's a narrative in the media in which women in the same circle can either be "sisters" or "enemies", instead of simply civilised people who don't hang out because they don't have anything in common.
personally I would have thought Meghan would have seeked out Kate's advice about this new part of her life (royal spotlight etc), but she may be a little too up her own high horse to ask for advice!