Engineers aren't a help if they have poor inuition and insight into security concerns themselves, which is true for almost all of them.
Filling departments with inexperienced people based on how well they can recall a classic algorithm on a whiteboard was never the set up for a secure software or IT ecosystem. Peers watching in shock and dismay as supply chain risk escalated year over year for the last decade, among other horrifying practices, have been crying over this all along.
They might be able to follow an AI lead better than someone even less technical, but it's unclear that doing without true expertise as an oversight and check would cut it.
Having walked ourselves into it long before AI appeared, We're set up for a dark time with few easy outs.
I have a more nuanced take on this, which is that many engineers may have decent intuition on security - but that's entirely besides the point here, because without the political capital to have a large organization (and their customers and counterparties!) change their workflows and security stances, they're tilting at windmills. Security is not one of those things that one can throw bodies at - it requires true attention and commitment from leadership, and time to percolate across every facet of a company. If such a mandate is in place, talent is far from the limiting factor.