Who is? I don't mean to be trite or contrary, but TikTok is coming into an environment where norms are pretty damned shady. Google as you and the article say, also consume user data quite unethically.
FB likewise surveil us for their advertising businesses. They both also happen to host and control a good chunk of political and politically adjacent content within that framework. Police and regulate it with no transparency. FB are also gave us our first big "scandals" with third party trackers and/or data sharing.
Other countries (including, but definitely not exclusively) also use tech companies as espionage assets.
TikTok is just a new pig at the trough.