She didn't say they "can't", she said that they "don't." "Beyond your experience and comprehension" doesn't preclude the acquiring of more experience, it just

She didn't say they "can't", she said that they "don't." "Beyond your experience and comprehension" doesn't preclude the acquiring of more experience, it just suggests they don't currently have it. She's pointing specifically at the people that are patronizing, and explaining why specifically their words are patronizing, not saying that nobody with any wealth could ever understand her - if they couldn't, what on earth would be the point of her blog?