I feel this is way too optimistic about the typical adult. Adults are most definitely affected by propaganda.

Problem is reality is so complex and usually all sides of a topic are right at the same time, in some way.

For any viewpoint A, there will be reels made by people in any demographic group who cares deeply about it for excellent and solid reasons. The same will be the case for anti-A.

Both of them will be convincing and TikTok can just choose which one of them to subtly nudge.