He's more likely to talk about camps in China than he is about the homeless in Los Angeles. One is a problem completely out of his control, another is one he could easily mitigate. You wonder why that is?
Myself, I do criticise my own government, protest on the streets, and also donate money to causes that work in opposition, mostly, to the current government. I've also made business decisions that involve much less interaction with mainland Chinese businesses and customers precisely because I disagree with the mainland Chinese governments way of doing things. Maybe it's cost me some money, but I sleep better at night.
As a Westerner, while its important to understand about the nasty side of China is somewhat pointless to endlessly focus on it because its not a problem we have the capacity to solve.
There are issues that we can obtain Chinese buy-in on like climate-change (we all live on this planet) so we should focus on things like this where we can work together so we can forge better ties instead of focusing on what we don't like about each other. Lets not do evil-empire all over again.