I don’t know why people think spying is the issue. It’s the potential control. For example, when this bill was proposed, TikTok sent a notification to users to contact their representatives. That’s not horribly harmful, but it does show a willingness to weaponize their user base (and their base’s willingness to listen).
If this bill wasn’t going to pass before, it sure as well would after that happened. You have to consider what else that could potentially be used for. Could they possibly use it to influence an election if a candidate was against their interests?