The reason why I asked the question is pretty simple. If you look at the definition of essential this is what comes up.
es·sen·tial
/əˈsen(t)SHəl/Submit
adjective
1.
absolutely necessary; extremely important.
"it is essential to keep up-to-date records"
synonyms: crucial, necessary, key, vital, indispensable, needed, required, called for, requisite, important, all-important, vitally important, of the utmost importance, of great consequence, of the essence, critical, life-and-death, imperative, mandatory, compulsory, obligatory, compelling, urgent, pressing, burning, acute, paramount, preeminent, high-priority, significant, consequential
"it is essential to remove all the old plaster"
Seeing how the word means something so important then I would only come to the conclusion that ex planing why it is should be just as important. Don't you think riot?