While you're right that there's a vast difference between a credit score and a social credit score, I would argue that the US credit score system does have a bigger impact on one's life than just not being able to get a loan. It is used to deny housing and employment and makes purchases more expensive due to higher payback rates. Since so much of our economy is built on consumer spending without the needed growth in wages over the last fifty or so years, some kind of personal debt is needed especially for people with low incomes who have to cover essentials one way or the other. It creates a self-reinforcing spiral that keeps poor people poor.

Things have improved here and there with the CFPB and some anti-discrimination ordinances at the local level, but it's hardly enough to narrow the effect as you described. Heck, it took us until the Biden administration to propose to ban medical debt from affecting credit scores.

In both cases, these scoring systems are part of a suite of incentives to get people to play by the rules of the power structures that exist: social credit for national authoritarians hierarchies and TransEquiSperiFax for the authority of capitalist hierarchies.

Again, you're not completely wrong and I don't want to claim that one system is anywhere close to being as pernicious as the other, but the US system not quite so harmless as you say. Sorry for making this so US-centric but that's where I have the most perspective.