As for the data collection, TikTok/ByteDance is definitely going to store it. They wouldn't collect it otherwise. To the utility of the data, if they've got MAC addresses of devices on your home network they can tell many of the brands of devices you own. They know when you get a new computer even if you never use TikTok on it. If you launch the app at your office they get the same information about your office network. In aggregate their network scanning will collect vast amounts of data.
The TikTok app is turning every user into a passive network scanner. Even if you want to ignore the CCP's influence on ByteDance I don't think there is any reason to give them the benefit of the doubt about their data collection. They'll sell their users and anyone around them. I have the same problem with Facebook and their damn shadow profiles and covert data collection.
You're misrepresenting the situation because you want to frame the whole issue as some xenophobia on my part. The problem is TikTok is a social network with millions of users whose parent company literally has the CCP as a board member and is subject to China's extremely invasive state security laws (requiring warrantless access to corporate data). The app was already an intelligence gold mine and now they've added a vein of platinum.
The only double standard is contained within the strawman you've created. I have the same problem with Facebook or Twitter apps scanning my local network for no reason than to increase their data harvesting. But since TikTok is the subject of the thread I specifically pointed out problems with TikTok. Facebook and Twitter have their own problems, some of them overlap with problems that exist with TikTok.
Neither I or anyone else needs to list the myriad problems with every social network when criticizing any one of them. You're trying to use a tu quoque [0] argument claiming xenophobia and hypocrisy (where none exists) in hopes that distracts from the points being made.