Comparing crypto wallets to trading apps demonstrates really well the main problem with cryptobros, which is that the vast majority of crypto users use crypto as a "get rich quick scheme".

DeFi has not eaten out a "huge chunk" out of centralised finance. That's demonstrably false. The vast majority of crypto users use cryptocurrencies for trading, not as a currency. Even in places where people are forced to use Bitcoin (El Salvador) the usage of the cryptocurrency is miniscule. According to the Central Reserve Bank, bitcoin was used in just 1.9% of remittance payments sent to El Salvador between September 2021 and April 202, and that was supposed to be the main selling point. Salvadorians rushed to get their wallets just to claim their free bitcoin, which they then instantly converted into USD. The adoption is piss poor across the world.

But this is a digression. Web3 isn't a synonym for DeFi, it's supposed to be a decentralised web powered by blockchain technologies - and this is something that still doesn't exist, and it will not exist, because the premise is extremely flawed to begin with.