You said there's no reason and then you list potential reasons right after. Yes, there has been progress and no one is arguing against that, but the two big issues are:
- What exists is being overhyped as far more capable than it really is.
- How much room there is to grow with current techniques is still unknown.
The computer, internet, and smart phone are all largely deterministic with actions resulting in direct known outcomes. AI as we know it is based on highly complex statistical models and relies heavily on the data it is trained on. It has far more things that can go wrong which makes it unsuitable for critical applications (just look at the disasters when it's used as a customer service representative). That's not even getting into the legal issues that have yet to actually be answered. Just look at the CTO of OpenAI squirming on the question of what Sora was trained on (timestamped).
Being able to overcome walls in the past doesn't guarantee overcoming walls in the present. That's like saying being able to jump over a hurdle is the same as leaping over a skyscraper. There's also the question of timing, it took decades for those previous walls to be overcome. Impact to the workforce is largely overstated and is being used as an excuse for cost cutting. It's just like the articles about automation after the great recession. I'm still waiting on robots that can flip burgers (article from 2012).