I agree with you and by the way don't think that apps like Skype, software like Mircsosoft Teams or operatings systems like Microsoft Windows and many others are trustworthier than Tik Tok.

In general I think every individual should decide themselves which risk they are ready to accept which data they are ready to share and which level of privacy they need.
Social Media sites like Tik Tok or Facebook don't guarantee enough privacy and data protection but at least evry user can decide themselves which data to share and if to use these sites at all. However, if the state wants any of my data, there is no way to hide it. That means in my eyes the states and governments themselves threaten harder to invade my privacy than any social network could ever do.

(I am aware that the situation of politicians who use their own devices for work is a somewhat special case.)