If you only look at it from the perspective of the influencer, it doesn't seem like there's any harm. They managed to extract some wealth from crypto whales. -- where's the harm in that? But at the end of the day, they're selling a lie. The NFT-proponents want people to believe that NFTs are inherently valuable so that they can extract all of their money back, and then some. It's propaganda, and I can't get behind it, even if it means some artists are cashing out.
There is a lot of initial investment from top-tier people who convince others to invest (by showing eye-popping returns) and drive more investment. Soon the people on the top-tier gradually cash out and eventually it's the common people who lost their hard-earned money.
Your second paragraph could be applied to any non-crypto asset class. The only difference I can see is that crypto just made this scheme more obvious, unobfuscated then let's say the stock market with its different investor classes.
That will evolve into the patron system again, where the owner of early works becomes a hype machine to drum up their artists clout, and then offloads their early work.