Those are great reasons for better data privacy laws. But why should I be more worried about TikTok than Facebook, Twitter, Amazon, Google, etc? Even if I'm worried about the Chinese in particular, would it really be harder for their cyber army to hack one of the other many databases?
As pointed out in the Wired article, they are already hacking bunches of databases not located in China, and infiltrating companies.
EFF doesn't think the ban is Constitutional, nor TikTok a particularly severe threat for the average user.
There are people who may have concerns about China having access to their data who have not had the same concerns about the US or EU countries: student protesters in Hong Kong, Uighurs, Covid 19 researchers, executives at Fortune 500 companies concerned about theft of IP, journalists with sources in China that they want to protect, US government employees, military personnel stationed abroad. Citing security concerns, both the RNC and DNC have warned their campaign not to use TikTok, and Wells Fargo has banned the app internally. But you can acknowledge that there are genuine security concerns for certain populations while opposing efforts to unilaterally ban an app used by millions of Americans. It’s possible, even in this day and age, to have multiple thoughts about a complex issue.
Nor, why China is singled out when the US government can get user data from any US tech company with a National Security Letter and no oversight.