The most brilliant scholar in the world will struggle to communicate their thoughts and insights if they do not have a grasp of the language.
Even native english speakers do not necessarily have a full grasp of the written word, and for students writing in a foreign language it is important to put their point across clearly. The nuances of english are well-known, and many words which sound alike have totally different meanings. Mistakes are frequently made with the words "there" and "their" for example, and the difference between "your" and "you're" is subtle but important.
Essay assistance can be vital if you want to succeed in communicating without putting up a barrier between yourself and the reader. You may have done the research work and your thought processes may be clear before you put them down on paper. However, the final hurdle may not be cleared if your essay is littered with ill-chosen words and grammatical mistakes. With essay assistance you can ensure that you do not lose up to one tenth of your marks for an essay, dissertation or thesis. It is unfortunate but true that 10% of your marks can be lost due to bad spelling or grammar, therefore it is also the case that essay assistance will be worth 10% of your potential success.
There is no question that good presentation and accuracy are two of the most fundamental assets which examiners - and employers - will be judging you upon, and without the reassurance and confidence that essay assistance will add to your finished work there could well be disappointment after all of your hard work.
The work will still be your own, of course. There is no element of plagiarism or cheating involved in using the services of essay assistance. Examining bodies allow for the legitimate proofreading of a candidate's work, and this creates a level playing field for students for whom english is not their first language, and also for students whose brilliant grasp of their subject may be counterbalanced by their lesser skills in grammar and spelling.
Naturally there is an educational aspect to this as well. Any student for whom spelling, and grammar as a whole is a stumbling block will instantly be able to see how their work can be improved, often in quite small ways, and learn from this for their future presentations.