I can understand the copyright stuff because Google can’t possibly afford the fight against the MPAA/RIAA. Why wade into politics though? What gain does Google obtain through political censorship?
Perhaps X leadership from Google spoke with Y leadership from China and reached this compromise in order to avoid a potential all-out ban of Google’s services in China, similar to - though nowhere close to the same reasoning behind - the US’ ban of Huawei telecommunications equipment.
PLEASE NOTE that this is purely conjecture. I am not affiliated with Google or China, in any way, shape, or form. This should not be taken as fact.