The problem is that most normal people (HN is not normal - mostly for the better) don't even understand what sideloading is - let alone actually care.
How can we fix this?
(aside from making people care - apathy enables so many political problems in the current age, but it's such a huge problem that this definitely isn't going to be the impetus to fix it)
Its a very slippery slope that is very close to being implemented. In a way, we can hope that the current political climate somehow decimates the American corporations that control the systems, but it looks more like IBM during WW2 supplying counting machines to the Americans and to the Germans and everyone else.
The phone platform is officially lost at this point, there is too much political pressure to control it. We are going to increasingly need to rely on sneaker nets, small mesh networks, and home made "illegal" communication devices. The internet will continue to exist, but it is going to fracture more and more with the political wars that are happening at the moment.