As a parent, I hate google a lot more than TikTok. I can already block TikTok, but I can't block youtube because the school district mandates it.
But ya, if a teen is otherwise cut off from devices besides the ones they get from school, then you could see that as a weak point, although I don't think that applies to a significant portion of families. For the ones that it does apply to, they probably have bigger problems to worry about than TikTok being banned.
Though, the saddest thing is that it seems like the U.S citizens, (i.e ANY of tiktoks 160 MILLION US users) have absolutely no say in the operations,a yet we actually interact with the app not these old people in Congress. The fact that Biden so swiftly signed the bill too makes me frustrated as I want to vote for him, but he keeps doing or okaying things that are counter to my values.