The team is taking a pretty strong stance against external AI-assisted PRs, which makes you think they'd take a weak stance against internal AI-assisted PRs? It's hard to draw the exact line, but maybe?
For our team, the outcome is the PR, and you have to set up _a lot of testing infrastructure_ to prevent regressions. It's a skillset like any other.
It would be consistent with their actions that my belief is they are slow to adopt workflows that will accelerate them. Thus velocity will decrease.