It might have something to do with 90% of the justification as articulated by the bill's own authors and supporters, and especially in the arguments before the

It might have something to do with 90% of the justification as articulated by the bill's own authors and supporters, and especially in the arguments before the Supreme Court and their opinion upholding it, being about "content-neutral" goal of blocking the ability of China to spy on US data. Even when TikTok themselves tried to argue that the primary reason was to prevent foreign control over a recommendation algorithm, the Supreme Court said "nope, Congress's primary motive was the data collection."