I used the term "cultural appropriation" instead of more positive sounding "cross-fertilisation" thinking it implied oversemplification and misrepresentation.

According to Wikipedia, https://en.wikipedia.org/wiki/Cultural_appropriation is not always clearly negative.

What I was referring to is the existing trend to pick ideas from hundreds of years ago, relabeling them while "forgetting" to mention the sources, and selling them as new in some self-help section in a library. This happens to western philosophy as well, and butchering complex philosophies to make them more palatable is hardly beneficial.