When you're the engineer responsible for releasing an AI model at baidu, and one checklist item is 'check for local laws and either exclude that country or get a local lawyer to check for compliance', it is probably easier to just exclude any country with specific AI laws than to hire 200+ lawyers to meet every countries laws.

This applies even more so when revenue from the model release is likely nil. You will get the academic fame and PR no matter what the licence says.