TikTok might (as far as we know and at any given moment) collect fewer individual pieces of data than other apps, but they have been caught circumventing protections and covertly collecting data.
https://www.msn.com/en-us/news/technology/tiktok-tracked-use...
Their actions are not justified by what other apps do. Regardless of whether GP's comment included speculation or was merely using hyperbole, the sentiment is reasonable. At this point, I think it would be irresponsible to defend TikTok.
See also:
https://news.ycombinator.com/item?id=23634138
Please provide a source.