Sue it is exactly the same thing. Exchange is the swapping of gifts, with which you do little with once you have got them. Progress is the ability to see what others are doing, see it is better and then add to it to make it even better still before passing it back. Cultural sharing, which is what appropriation is, has been going on since the dawn of time and everyone in the world has benefitted. Whether it is the development of drugs, mobile phones, styles of dress and adornment or cuisine.
It is very rarely that one nation adapts something from another nation and does not acknowledge it, usually that is impossible . As for your comments on plagiarism etc. All I need to do is read someone elses ideas and reword them and they are not protected, a patentee cannot stop you using his patent as a basis for improvements, which means with those improvements the original patentee has few rights, the same with copyright, all these protections merely freeze an item in one type, once someone changes it the protection has gone. This is what has been happening since year Zero and is why we live the comfortable easy lives we do today.
Well. I am about to go up to bed and I will sleep in my pyjamas, or must I cast them aside and put on a night dress because I am cultural appropriating an Indian garment with an Indian name?