>>12428491 (OP)No one's is truly mentally ill; what I mean is that mental "illness" is not truly an illness, but a disorder.
A disorder is a term given to a collection of symptoms that often paper together and seem to have a common cause.
All individuals often exhibit some mental disorder symptoms to various degrees, which are dampened by their ability to cope with them.
It's not that everyone became mentally ill, but that admitting having some symptom became more socially acceptable.