But why messing around with custodial services, forfeiting the ownership of your coins to questionably protect your privacy from centralized exchanges and such, at the very moment when decentralized, privacy-friendly, non-custodial solutions exist (i.e., Bisq)?
From the Twitter post you shared, I think that's the best reply:
People use custodial wallets because they don't know better. Making more custodial wallets rather than more self custody wallets just makes it more likely people make a bad choice.
People who don't have custody should rather be educated to ensure they have that (and privacy later on).