This is misguided and naive. The real world analogy is closer to Huawei 5G systems -- thinking about it in that context, the reasoning behind the ban makes more sense.

This isn't a "capitalism based harm" that tariffs are intended to fix, this is a "national security based harm" that's being targeted. You can debate the merits of whether or not TikTok is a threat to national security, but under the supposition that it is, tariffs are not the correct lever to pull.

So, it's not "that easy". I like the smugness though.