Except the turnstiles and swipe cards do almost nothing against an active shooter situation.

But missing in this discussion is a risk and consequence analysis. If the risk is armed attackers, do something that targets that. For physical theft, target that. Likewise IT risks. The core problem is that risks were not being identified (systematically or in response to expert feedback) and prioritised.

Incidentally, the solution to car park access is ALPRs, and the solution to most of the physical security is solid core doors at the workgroup level with EACS swipe and surveillance cameras there, and at the front desk have face level 4k video surveillance. With an on duty guard to resolve issues with access.