About a year ago, I nearly quit my job over this, going so far as to put my two weeks notice in as a way to hold a gun to their head, repeating my frequent request that all directives handed down from on high _must_ be in writing if they are expected to be followed. My company had (still does, to some degree, but we are still working on it) a cancerous culture of he said/she said that was being abused to avoid any accountability from upper management, which was both impeding the actual work being done as well as demoralizing to th workers. We even ended up losing some talent over it before I used my own value and authority to put my foot down, making me wish I'd done it sooner.
Verbal directives only stroke the ego of the person delivering them and their meaning either evaporates or gets twisted as soon as everyone walks out of that conference room or logs off that video call. If the person issuing them is not willing to have their directives questioned when they are in writing, then they should not hold the position they do. It's not about questioning someone's authority, it's about ensuring the directive makes sense with the work being done and adds value or guidance to the existing processes. Screw the fragile ego nonsense.