The purpose of the ESRB is to attempt to avoid the creation of a government-run ratings body which would be even more ignorant and likely engage in the kind of de-facto censorship seen in Germany and Australia.
If rating systems have a useful role to fill - which they potentially do in terms of informing would-be purchasers what kind of content to expect - they certainly aren't filling it at the moment. Ratings obsess over utterly pointless factors like blood and exposed breasts which really aren't going to have the slightest effect. At the same time games are full of ambient sexism, racism, size prejudice, political content and all sorts of similar things which ratings completely ignore but which are far more likely to actually have some impact.
If rating systems have a useful role to fill - which they potentially do in terms of informing would-be purchasers what kind of content to expect - they certainly aren't filling it at the moment. Ratings obsess over utterly pointless factors like blood and exposed breasts which really aren't going to have the slightest effect. At the same time games are full of ambient sexism, racism, size prejudice, political content and all sorts of similar things which ratings completely ignore but which are far more likely to actually have some impact.