> How do you know?
We know because we could see the effects of the average rate of vulnerabilities discovery and exploitation, and it's definitely going up very fast. Until recently, vulnerabilities were relatively hard to find, and finding them was done by a very restricted group of people world-wide, which made them quite valuable. Not any more.
That's correlation, not causation.
It could equally be argued that the AI slop that's being produced makes for a lot more vulnerabilities being shipped. The bigger target makes for the easier discovery.