"Not wanting" to work is an attempt to weaken the position of the person who suffers from burnout, as it puts the responsibility of the problem solely on them which is inaccurate at best, and dishonest at worst.
Quoting Wikipedia:
> According to the World Health Organization (WHO), occupational burnout is a syndrome (group of symptoms that co-occur) linked to long-term, unresolved, work-related stress. [1]
> According to the current WHO classification (ICD-11), burnout can arise from unsuccessful management of chronic work-related stress, resulting in an occupational syndrome characterised such symptoms as "feelings of energy depletion or exhaustion; increased mental distance from one’s job, or feelings of negativism or cynicism related to one's job; and reduced professional efficacy." [1]
(Notice the URL's name is occupational burnout. There are other forms of burnout.)
I take it you're able to imagine that such is not always the sole responsibility of the employee but could also be co employees, work environment, management, employer, pressure, family, things such as breaking the law or "working around the law" while conscience takes its toll?
From my experience, I can say I've observed there are people who have not much clue about diseases such as burnout or depression or a disability such as autism unless they lived it themselves or put substantive effort (which takes a considerable amount of time and energy) into the issue (an example of such would be, thankfully, a doctor).
Burnout is more like desperately wanting to be able to work but a variety of things ruining your sleep, your concentration, your memory, and your health so that you can't.
Maybe they’re just saying that to you because they assume (as an expat) that you don’t share their value system?