Those statements are true on a basic level, as Iran has generally been at the mercy of sanctions (including after its nuclear shutdown deal) that limit what it can do. However, this is as much about maintaining the status quo as anything. A national network makes it harder for countries like the US to plant malware. Infiltrators would have to slip rogue code on to a computer inside the country, like what happened with Stuxnet. And of course, it's much easier for Iran to censor ideas on a domestic network -- it doesn't have to worry about foreign companies that are beyond its control. Iran's internet access isn't going away, but there's no doubt that officials would prefer to wean people off of it and assert more control.