Outhue, I think you're missing some key points here about privacy and Bitcoin.  This whole "decentralization is all we need" view is just too black-and-white.  The blockchain may be decentralized but it ain't private.  Every single transaction - the addresses, the amounts - its all out there forever for anyone to see and  that ain't privacy.  It's pseudo-anonymity at best.  Big difference.

Sure the identities are hidden, but blockchain analysis can trace those transactions easy enough.  Whether it's the cops or some big data company or even other criminals, they can follow the money trail on the blockchain no problem.  So if youre someone important making big money moves or just an average Joe who don't want all your purchases on public record, vanilla Bitcoin privacy protections just don't cut it.

I'm not saying we all need to be shady criminals to want better privacy.  But acting like the transparency of the blockchain is no big deal for privacy - thats just naive, man.  There's legit reasons - even ethical ones - someone might want more privacy with their finances than Bitcoin provides by default.  We gotta acknowledge that.