Yes, I think there are numerous very real problems being described with the cultural appropriation term, but it was/is a probably not a very intuitive term to describe what people really wanted to discuss that was cultural harm and the problems caused when one group of people, as you say, are rewarded for taking and using cultural symbols that people from the culture that created them are effectively punished for using and displaying. I think it may require more than just acknowledgement to redress that balance: sometimes it may require avoiding using a symbol that has been misused too often too recently, or may require providing material support to cultural groups that originated certain ideas, or working out collaborations, it depends very much on the specific cases and projects. But I don't think there's any future to be had in deciding that symbols, traditions and ideas are to be treated as simple property items and/or preserved in concrete or museum-glass forever.