NFTs are already centralized and primarily used as scams. If your non-scam NFT is blocked by OpenSea, it might as well not exist for the purposes of selling and re-selling.
Where NFTs are not used for scams, they're being implemented in a proprietary blockchain and used as a method of extracting more money from customers with no new benefits (it's not like customers can re-sell their NFTs; see: proprietary blockchain).
The only thing I potentially see as valuable from web3 is cryptographic customer identification - but this is something we've had for years (client certs), but which never took off. I don't see how "web3" will change that.
None of them are scams. I know many people who work on other NFT projects which aren't scam as well.
They are all on public blockchains, perfectly functional with relatively healthy communities.
I think you are cherry picking the scam projects by using the word "primarily". We hate scam projects just as much as you do, they damage the reputation and trust of whole ecosystem.
People can collect and trade items of virtually any kind that virtually represent anything digitally. They can also be programmed to perform tasks to do anything on the chain.
Basically it's creating a whole new platform that isn't controlled by anyone and everyone can contribute to it as a user or a contributor (NFT creator, contract designer etc) to suit different use cases.
Just because some actors use it to scam obviously doesn't mean that the whole ecosystem is bad.
For now. Governments are catching on, and since the transactions are public, they can (and are putting the building blocks in place now) easily apply the same regulations to international bitcoin transactions as they do traditional money transfers.
Basically, folks today are taking advantage of a blind spot in government oversight. They're aware of it and are removing that blind spot.
I heard an analogy at one point - governments are elephants. It's usually pretty easy to avoid being stomped on when you're small. But if you do get stomped on, you'll be utterly destroyed. Many governments have no problems with making examples of people.