While you are correct in that most things borne of the blockchain space are scams, it's important to understand that it's not much different from the "technology" of the FAANGs, in terms of the harm principle.
We like to denigrate NFTs and Tether, and slag on the enormous climate and social costs of BTC speculation, while we turn a blind eye to the fact that social media and adtech are fundamentally parasitic and socially destructive technologies that are far worse for the climate, our mental health, and our privacy than an exit scam or an overpriced NFT could ever be
It's fine to criticize this space, but it's particularly funny when this criticism comes from people fully invested in GOOG, FB, NFLX, and SNAP, or who are actively writing code to enable our modern Panopticon.
[1] https://www.federalreserve.gov/central-bank-digital-currency...
You can build a pyramid scheme on facebook too, but facebook is not a pyramid scheme.
As long as it's centered around the value of BTC, this is false. BTC has totally failed as a currency and is completely dependent on speculators pushing its valuation up to keep the miners profitable. I'll be willing to concede this point to you if eventually all proof-of-work coins disappear and the BTC maxis go away, and the incentives change to move away from mining and towards providing real services, but I doubt this will ever happen given this was the whole reason the crypto bubble happened in the first place.
Perhaps you want to define web3 in a more vague way like "any web business that uses a merkle tree publicly in some fashion". You can do that but either you're still left with BTC maxis leading the charge on that, or you have to expand it in such a way that the term becomes meaningless because it applies to a lot of unrelated things. Was google a web3 business before anyone knew what that was because they used a merkle tree in google drive, and google drive was public? How about github with their public git repositories? See what I mean here?
Edit: typos
I used to be very interested in defi but I can't anymore when it's evident that the same market forces and consolidation and network effects keeping traditional banking afloat are also keeping BTC afloat because too many people are invested in keeping it the dominant coin. I really hope I'm wrong and BTC is not "too big to fail" but if I am then I expect you'll see these fancy web3 startups pivot back to making "boring" web 2.0 banking systems because there is no big money in defi anymore.