When anybody writes, it is just not the use of a pen and pencil on a paper, but it is a process that involves coordination between the mind and motor actions of the brain. The brain conceives a thought and directs hands and fingers to reproduce these thoughts in the form of words or sentences, with the help of a writing instrument on a writing object.
We can draw an inference from the above statement that the reverse process is also true. That is to say, if one has good handwriting skills, it has invariably been observed that he/she also has a better thought process.
The above statement can also be substantiated from the fact that the top 10 students of any classroom usually have highly developed writing skills.
Handwritten communication being the most primitive media of expressing oneself has been proved to be an effective process of learning a language in terms of correct spellings, massive vocabulary, and exquisite communication abilities, both through written and verbal forms.
The fact is that we are living in a high-tech era. The pen seems to be replaced by the thumb, touch screens, and keyboards. But, the fact continues to remain that you need to be familiar with every letter and word to reproduce thoughts through typing. And this can only be best learned by using a pencil or pen during the school days.