Nobody said that consuming foreign controlled media is prohibited. And banning TT isn't about that. It's about Foreigner Interference.
You said that it's foreigner media not interference. The difference is that media are verifiable and can be checked by anybody and everybody has the same information. That is not the case for social media.
The problem is for another country to be able to do mass manipulation. Like the Facebook–Cambridge Analytica manipulation scandal, where they push some "ideas" to a very specific population because the data they collected show that you will act or think in a certain way. Since when you consume media you don't know they do it AND nobody can prove they do it, it's now manipulative and so interference (can also be done over a long period, such as several months or years, to gradually modify your point of view and be less detectable).
If there was a message saying “We recommend this video because we think you'll react like XXX”, I might consider that ethical (there are other problems too, but that's a theoretical example).
You might say that people in the US (or any other country) still have the right to consume foreign-controlled social media because they know they can be manipulated. Even if I agree, I think it's normal that the state make it difficult to do so. I won't blame people who use opium but I will definitively blame the USA people (or state from any country, here it's USA) for facilitating opium use.
You might say also that the manipulation can be from within the USA (like with Cambridge Analytica), it's true. That is definitively a good point. And to defend the ban of TT, I will say that I don't have a perfect solution. I don't like the ban of TT either, but it was necessary because of the risk of mass manipulation. We have to come up with a better solution (that we don't have now). Because it may happen soon on X or Youtube and we can't ban every social media we suspect will do mass manipulation on the sly.
I hope you get my point because I think that is necessary for us to do so to come up with a better solution. One that will integrate your POV because it's entirely justifiable.