One of the main reasons TikTok has been grilled by congress is because of China's stance and willingness to violate any law for their own benefit.
One of those benefits not very commonly understood in America by the general populace is Political Warfare, which China calls the destruction of national will in their own documentation.
The USMC University has an ebook that is freely available that describes what is done, why its important, and its effects. It is a worthwhile read, if you do further research on this know that Bezmenov is not credible; there are much more credible sources, that's not to say what he says is necessarily incorrect, the best deceit weaves truth into lies.
The general gist is they seek to put people into a psychological state of demoralization, in that state you typically polarize into two separate groups.
Apathetic and complacent where you don't react to anything, and the other where you lash out at anything that you perceive or triggers you (through psychological anchoring [using NLP vocabulary], and various form of isolation). The conflict between these three groups (apathetic, violent, rational) allows a smaller number of people to seize power in a destabilization event which is a regime change playbook that most governments have used at one point or another. Historically, the last stage of that playbook involves getting back to a new normal by consolidating, and eliminating detractors (those people that lashed out).
Its subtle, and deceitful, but certain things you just can't give others the benefit of the doubt. Existential threats to your individual identity (which is what's often targeted during propaganda, and political warfare efforts), are one of those things. If its present, the source isn't credible and shouldn't be used regardless of what they say.
P.S. There's also a lawsuit from a TikTok insider that just made headlines recently disclosing how code was in the app to allow CCP backdoor access to US data and amplify or de-amplify narratives according to Communist core values. If there was any question about TikTok's credibility and their narrative that they don't do this; that pretty much seals the deal given everything else assuming of course what was said is factually correct.
They clearly would not have credibility, which would eliminate them as a potential choice in any risk management analysis you might need to do.
[Link]: https://www.businessinsider.com/new-lawsuit-alleges-tiktok-o...