If the government is going to become the defacto credit rating agency, they might as well be the defacto lender. Obviously loan rejections and low scores will be unpopular and an easy lever to push on for more votes, so just ditch the credit ratings all together and have a government lender that lends taxpayer money for all loans at a flat-rate.
Which basically has happened already - student loans - and we all know what a rosey picture that is.
FedEx, DHL, UPS and government USPS
Parks - there’s a ton of types with equivalent public and private versions
Police - private security
Firefighters - there are private fire fighters who protect houses threatened by wildfire - they just don’t need to respond when it comes to responding to stuff like traffic accidents and health incidents
Etc etc
That flawed analogy is like saying I have a baton so police aren’t a monopoly on protection, when my analogy actually was private security companies.