I was just listening to a talk on the difficulty of understanding legal, and other, documents not written in plain English. The talk was in Portuguese, but, it had subtitles...in plain English.
At one point, the speaker said, in effect, that, once we leave our own area of expertise, we are often little better than the illiterate person who cannot read at all.
This reminded me of a time, several decades ago, when I was the business manager for a public mental health facility in the small community of Milton, Florida.
The staff was primarily comprised of Masters-level counsellors, and a couple of PhD's. They were all intelligent, very competent and well-educated in their fields, and quite good at helping people with their problems.
However, I was regularly called into their offices to help them set the thermostat, or to advise them on how to fill out business related forms - most of them just couldn't figure it out.
I have run into this same phenomenon several times over the years. People who were experts in their particular fields, who were "Lost in Space" when they moved into other subject areas.
This is one reason why I am not always receptive to people who are good at what they do normally, such as acting and singing, or counselling individuals, when they choose to pontificate on subjects such as politics and economics.
By the way, this subject is way outside my training and areas of expertise, so feel free to ignore it.
Donovan Baldwin