It seems unreasonable that US government can dictate what apps one can use or not use, and also there is no semblance of a transparent due process being followe

It seems unreasonable that US government can dictate what apps one can use or not use, and also there is no semblance of a transparent due process being followed for this. Also TikTok has not broken US laws as per US courts. How can the President ban something which is not app/anything which does not run afoul of existing laws? That's why this is essentially an arbitrary move. The national security threat seems a vacuus argument as per many data security analysts, tiktok not being that different from instagram, etc. The president/executive should not have authority to ban anything at all without a legislative process.