Normally, we do not try to explain things which are out of our competence.
In order to gain the understanding and competency in explaining or just talking about certain matters, we first attend some courses or training programs to explore these questions on our own. Afterwards, we are able to say something reasonable in this regard, and our words are substantial and convincing. Also, if the issue is more serious, more competence is logically required from the speaker to approach it.
Explaining computer technologies cannot be done by a person without the corresponding knowledge that only has a distant idea about a computer. Teaching about car construction and the rules of operating it cannot be conducted by a person who just can drive a car – even if they are good at it – but has never learned the skills expected of a car mechanic. It would be ridiculous to try to find information about a disease and its consequences from a patient – even if he is very sick – instead of asking a professional doctor, unless that patient has learned something of the disease on his own and has specific knowledge. Many more examples of this kind can be provided. I am sure everyone will agree with the fact that it is not possible to persist with absolute certainty in what you are not competent at or what you have not explored a bit more profoundly and tried to understand.
Therefore, this observation comes to mind: is it not often that a modern person undergoes making statements on matters essentially unknown to him or her because he never studied them? People stand up for certain ideological positions regarding abortion, contraception, sexuality, family, homosexuality, etc. But who among them, and how much time has one dedicated to comprehending and investigating the heart of the position one stands for? I am convinced that most people apply a simple argument: I do it this way, so it is a good deed! But you must admit that this is a bad argument, and it cannot help build up one’s life. On such a foundation, vitally important decisions cannot be made.
I remember the story about a youngster who boasted of knowing well how to handle girls and be able to say anything about them; of knowing how to approach them, how to seduce and “use” them. But when this «expert» was asked why women periodically have menstruation, he just shrugged his shoulders, blushed and became silent…