Sacrosanct
Legend
Now it gets silly.
You are doing a disservice to all people actually suffering by claiming people are harmed because they arbitrarily decide some things are part of their culture which they somehow own and someone else who does not fulfill some arbitrary criteria and using it in a way this person thinks is inappropriate.
No one owns a culture.
But when you feel so strongly about it, there is only one solution. Don't use non-european cultures in your games.
The only thing silly, is that despite the overwhelming evidence, and the clear definitions and articles explaining in detail why cultural appropriation is a bad, you and others are trying to act like it's all a made up thing. Real, actual damage includes but is not limited to:
It perpetuates white colonialism
it distracts from how much communities borrow and steal from marginalized people
it prevents learning about true cultural exchange
it confuses people about which traditions come from what cultures
it propagates pejorative racist stereotypes
If you want to know why in greater detail, I suggest reading the articles I listed above. Needless to say, all of the above can and has resulted in actual harm, from loss of identity, discrimination, profiteering, and racial violence.