As a rule, doctors misunderstand medical conditions (reversible) diseases (irreversible), following Koch, as univariate, i.e. causal, and not surprisingly, they realize that most diseases are idiopathic, without a known cause. As a rule, medical conditions and diseases are idiopathic – they are multivariate, a-causal. It is not our ignorance of causes; it is the lack of utility of univariate models that is the problem.
With few if any exceptions, both medical conditions and diseases are multivariate and a-causal, and we – our weaknesses – are mostly to blame for both sets of maladies. Agents of disease, so-called causes, are nothing more than challenges, selective pressures of varying strengths, with Salmonella being an example of a weak selective pressure, and smallpox and Ebola being stiff challenges to our defenses.
Our weaknesses are most responsible when we succumb to most diseases.
As a rule, specialists are worse offenders -and insufferably arrogant about it- than general practitioners.