It’s not only that but also all that “crypto is not technologically interesting and it’s just Ponzi scheme!”.
There are so many interesting and unique things there. You can mix cryptography, finance, etc. into endless amount of protocols.
Here is some interesting ideas in crypto: decentralized stable coin (dai), automatic market makers (uniswap), zero knowledge rollups, dns that you actually own and not rent, p2p prediction markets, automatic borrowing, algorithmic stable coins without peg and so on and so forth.
And there is always something new.
I think blockchain is essential building block of the future free web.(at least stuff like dns)