You're conflating anonymity (pseudonymity really) with privacy. One hides identity, the other hides content/actions.
No, it's not like that at all. The point is with Bitcoin you DONT NEED a view key to see everyones transactions. That's the problem.
*BIP-47 is dead atm Samourai was shutdown and leaked metadata on chain anyway.
*Silent Payments don't hide your addresses from your counter parties or timing/amount analysis.
*Coinjoin is obfuscation - it doesn't hide/encrypt anything.
*Address reuse and consolidation is unavoidable for most users. One small mistake undoes years of "privacy".
Look at all the work you have to do and time/money spent to still end up with inferior privacy to Monero
You're still bringing up things that have zero to do with privacy like "economic incentive distortions" whatever that means
A small dark pool >>>>> a large transparent pool
Yes Monero doesn't protect you when transacting on exchanges obviously. Nothing does.