There's attempts to fix that, but it's hard because these regions have COMPLETELY different rating systems, different licensing policies, different laws to deal with, different language requirements, and I assure you blaming the American division for Playstation is meaningless. (blog.us.playstation.com)
This ultimately became the beginning of a variety of different rating systems, but eventually, this would all come together as the Entertainment Software Rating Board (ESRB), which is still used to this day. (retrogamenetwork.com)
Each company uses a slightly different rating system, but the general approach is that the more health risks you pose, the higher you will be rated, until you reach a critical risk level that means you can only be insured through insurers willing to cover a higher than average risk. (usinsuranceagents.com)