assume you did not read the commitment key packs paper.... if you are saying pedersen commitments is zerocoin, you have no idea what any of this actually is. Pedersen commitments are a type of commitment scheme which is used to create addressless transactions. They use the pedersen commitments cryptography to allow for borderless zerocoin deposits. that itself is a seperate protocol from zerocoin, and can be used for any protocol. commitment key packs are not tied to zerocoin, it can use any type of cryptographic privacy. commitment key packs just creates an addressless transaction layer that in nix's case uses zerocoin to facilitate the transaction. for example, commitment key packs can use zerocash protocol or CT/ring ct, it doesnt matter in that regard. they are seperate protocols. dyor, read the paper, and make sound arguments.
what you are saying is like saying cryptocurrency IS blockchain tech, when actually, cryptocurrency uses blockchain as one of many tools to achieve its goal. Sure crypto uses blockchain, but it can also use hashgraphs and other similar data structures.