Yes. Don't even need to read it. Anytime you read the sentence "our definition" it's wrong. There is no such thing as "burn out". It's a marketing term. Practice root thinking (https://breckyunits.com/root-thinking.html). Ignore marketing buzz words, especially if they come from social sciences like psychology, psychiatry, et cetera.
Obviously fatigue is a thing and you need rest, but don't believe anyone who tells you you have some easily labeled condition—it's almost always B.S.
You need to hold in your mind two completing concepts. One is that you might have a condition, and that condition may not be fully understood by medical science, and need some self-experimentation (for example, meditation, diet, blood tests, psychotherapy, drugs). The other concept is that it might blow over with rest, time or a change in thinking patterns and there is nothing to fix. Since you can't know which is true, both need to be nurtured!
> All ideas are trees. All products start as ideas. Therefore all products are trees.
The conclusion or the second premise should be changed to make the former a true statement. So either "Therefore all products start as trees" or "All products are ideas".
Obviously fatigue is a thing and you need rest, but don't believe anyone who tells you you have some easily labeled condition—it's almost always B.S.