Your mistake is assuming the company cares. The "company" is a hundred different disjointed departments that only care about not getting caught Equifax-style (or filing for bankruptcy if caught). If the marketing director sees a shiny new thing that might boost some random KPI they may not really care about security.
However in the rare chance that your bank is actually half decent, I'd suggest contacting their IT/Security teams about your concerns. Maybe you'll save some folks from getting scammed?
Corporations are ultimately no better than governments and likely worse depending on what their regulatory environment looks like.
Find an exec that needs a project to advance their career. Make your software that project.
Suck in as many other execs into the project so their careers become coupled to getting your software rolled out.
If you treat it as OR instead of AND, then your security is only as good as the worst link in the chain.
"My voice is my passport. Verify me." [2]
Asking customers questions that they don't remember and that fraudsters have in front of them isn't working and the time it takes for agents to authenticate is very expensive.
While there is no doubt that companies will screw up with security, you are making wild accusations without reference to any evidence.
Maybe one day someone will successfully argue that adding easily defeated checks lowers security, by adding friction for no reason or instilling false confidence in users at both ends.
Meanwhile, yesterday my credit card company asked me if I wanted to use voice authentication for verifying my identity "more securely" on the phone. Surely the company spent many millions of dollars to enable this new security-theater feature.
It begs the question: Is every single executive and manager at my credit card company completely unaware that right now anyone can clone anyone else's voice by obtaining a short sample audio clip taken from any social network? If anyone is aware, why is the company acting like this?
Corporate America is so far behind the times it's not even funny.
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[a] With apologies to Daft Punk.