This is doubtless true but has little to do with issues in playing specific characters that some groups might find problematic and others will not.Whether or not that is true, it could still be an issue for people of heritage from those countries living in North America.
It is an understatement to say that people of both Japanese and Chinese heritage have been treated very poorly in North America. Chinese people were enslaved to create railroads and Japanese people were put into concentration camps for example.
Violence against them has risen dramatically with the onset of the global pandemic as well.
Having positive representation in popular media would make a meaningful difference for them. At the very least it will heighten empathy toward them when white people see them as protagonists on screen.
It's also true that people not of a community should amplify the voices of minorities but never speak for them and that we must be careful that we're not mistaking a vocal group within a minority for their unified voice. I feel like a lot of very well-intentioned folks end up making things worse by sticking up for people that neither want nor appreciate their help.