@stefano Had this happen years ago, when I recommended a change to a setting in an app that I’d been using for 25 years and consulting for nearly 20 at that point.
Asked them to explain it, and they spent 20 minutes at a whiteboard full of lines and boxes and disks and databases.
I opened up the documentation, and shared on the projector the three paragraphs that clearly explained the three options.
The team decided to implement my recommendation based on the documentation, and no apology was ever given for this individual wasting everyone’s time.
Thankfully the individual was moved to a different department shortly after that.