Sounds like they're doing their jobs, which is to protect your future selves from your current selves. Sure, finding solutions is great, but faulting them from finding problems and slowing things down until solutions are found is odd.
Yes, security or IT does sometime have to act as a reality check in an organization that has over-hired over-zealous but under-experienced go-getters who want to "move fast and break things". They are a vital counterweight that makes ambition productive, instead of allowing it to wreck the organization's reputation.