Just bc people don't agree that a surprisingly shitty rendition of a pixel alien is worth $140,000,000, that doesn't mean they "don't understand NFTs", it just means their bullshit detector actually works.
As soon as 1 person issues a replacement NFT due to theft or something the entire idea comes crashing down bc now the "real copy" is actually "owned" by some thief and a new "real copy" is being created. From what I read a while back you kind of just have to trust that ppl won't sell the same "real copy" over and over again. This works fine in the real world of tangible goods but when people can be anonymous it's just begging for abuse.
You don't own the artwork, you own an URL pointing to the artwork which can change or stop working at any moment and likely isn't maintained by you.