The structure is untenable when the work of one team is to say "no" to other teams, when these teams are not asking.
A good infrastructure team would seek a competent security review that would say "no" to problematic things before an intruder says "aha" to them. If feedback from the ethics team is not sought, nobody is going to heed its opinion anyway.
I’ve never known a security team to be in the position to say “no.” The role of security teams vary a lot from one organization to another.
But generally they can make you aware of the tradeoffs you are making, or serve as a kind of quality control that generally does not want to be asked questions.
A good infrastructure team would seek a competent security review that would say "no" to problematic things before an intruder says "aha" to them. If feedback from the ethics team is not sought, nobody is going to heed its opinion anyway.