Over the long term this state of play could change, and IC/LEO organizations could start leaning more on application vulnerabilities than on platform RCEs. But the action would probably still coalesce around a couple of app-layer targets that could themselves be hardened.
I think this is a side-effect of the old product management process adapting to AI. We (as an industry) were never very good at defining features rigorously, because there was a smart human in the loop who had to implement the feature and could push back on sloppy definitions.
Whereas security bugs are easy for the LLM to define and fix.
Any engineer who's skill value evaluates below 0 on my scale, ends up with a large negative number when they use AI. Anyone with a positive number ends up with a large positive number.
The extra bugs you're seeing are from devs on the wrong side of 0 on my poorly defined scale.
That said if companies want to "ship ship ship fast", then yes even AI can produce bugs or regressions if not carefully reviewed by the human.
These days we're generating multiple times more code than we were writing before. That means a similar multiple of opportunities for bugs to be introduced - so the ability to automate security review is more impactful in proportion to that.
How do you know? You might be adding (latent) bugs every time your LLM fixes one for you.
You should question your ability to see any bugs on YOUR side.