So if we imagine a very rudimentary social hierarchy with a government on top, then thousands of corporations below, and then millions of people below corporations, this feature protects people in a case when government is malicious, but every single corporation is benevolent. Now if the government is not malicious, but corporations are, even part of them, it will allow them to basically take any payment and refuse service or do any other variants of abuse, costing time or money (think how it is bad today, and make it worse). And there is nothing to be done with it, because payment chain information is broken. Which is very useful for criminals who would want to run some business unaccountable and outside of the law system, and not very "useful" for the regular people.