Well that’s the crux, isn’t it.
If TikTok is just a business, like ByteDance insists, any business would rather get something than nothing. So ByteDance would sell.
If TikTok isn’t merely a business but rather an organ of soft power, and China blocks a sale, then the suspicions of the U.S. intelligence community are confirmed.
Using that logic, facebook, google, etc are not businesses either since they chose to be banned from china.
Google, Facebook etc don't have a "Chinese market" product at all, so there's nothing to sell off. If they did have a Chinese market product, worth many tens of billions of dollars, they would very likely sell it rather than spike it.
Essentially, you are asking everyone to assume that Bytdance does not really have a financial choice in the matter, and therefore financial irrationality is evidence of corruption.
When the reality is that the money may not mean as much to them as you are asking people to assume, and that in lieu of a payout they'd rather not reward a sale to the country that is strong-arming them. Which few with financial flexibility, and a healthy ego, would.