Not an unreasonable concern. Remember Google's Project Dragonfly? They were building and testing a system which would not only censor Google Search in mainland China, but provide Communist Party authorities with unlimited access to search logs.
They only stopped because they got caught, and enough Google employees caused a stir about it internally. The executives who supported this project and kept its existence secret within Google are still with the company. Who's to say they won't try again, in China or any other country?
https://theintercept.com/2018/11/29/google-china-censored-se...
>Locating core parts of the search system on the Chinese mainland meant that people’s search records would be easily accessible to China’s authoritarian government, which has broad surveillance powers that it routinely deploys to target activists, journalists, and political opponents.