I don't doubt that that would be a very real consideration, a pressure out there in the world that anyone developing AI would have to contend with.
I think the problem is with treating this like an inevitability. You are always going to deal with the idiosyncracies of the world: personalities, motivations, contingent world circumstances.
And beyond that, I think we have to keep in mind that this is, after all, fiction. The writers may arbitrarily structure their world in a manner that puts a spotlight on things they feel are interesting. And, within the limits of that spotlight, they may consider things like artificial intelligence in a way that is sincere to the subset of futurist considerations they are interested in investigating. And perhaps that involves suppressing plausible forces we would expect to see, such as military and corporate interest in advanced AI tech.
Can't imagine the character played by A. Hopkins would even pick up a phone call from military.
edit: In fact half the time tech moves in the opposite direction. Going onto the internet to argue that potentially civilization-changing technology won't be used largely for entertainment because it'll end up exclusively owned by government shows a profound lack of awareness.
We can say that the vast majority of living beings on Earth do not seem to seek any form of radical self improvement beyond ordinary developmental learning and mastery of survival skills. There is no intrinsic reason that there must be an impulse to exceed oneself. Why would AI be different?
AI's, like humans, need a purpose. The best way of achieving that purpose is by self improvement so any AI which does not self improve to some extent will be replaced by another that will. Just like humans who don't care to self improve eventually don't reproduce enough to spread their genes.
An alien AI, on the other hand, would most likely be incomprehensible to us, at least until we understood the aliens that created it.