I think you are being incredibly generous. I'd put that figure at well over 90%. Most people do not care about their privacy, like, at all. I know there are plenty of us here who do, but as bitcoin expands and more and more people get involved, then the proportion of us who take privacy seriously is continuously diluted. If people are willing to have Google or Amazon record every word they say, then they aren't going to think twice about Coinbase sticking their noses in to their financial history.

Yup. And it's not just exchanges either, although pretty much every centralized exchange is becoming more like a fiat bank as time goes on. The biggest payment processor - BitPay - is also thoroughly anti-bitcoin, pro-KYC, privacy invading, etc. The most commonly used wallets - Blockchain.com, Coinbase, Coinomi, Trust wallet, coins.ph - are either custodial, closed source, or both. Even the majority of altcoins in existence are centralized scams.

Unfortunately, where there is money to be made, principles and ideals rapidly get through to the wayside.