As an advanced ESL learner, I do have to voice my discontent how some native English speakers just love to 'over-correct' things we've written as if they were the only model but in fact there are so many grey areas in English and nothing is quite unanimous.
In this forum, most people post material in the hope that corrections will be made. As we are aware that many people may be taking examinations such as FCE, IELTS, TOEFL, we tend, unless asked not to, to err on the slightly formal side.
However, the good thing about
anybody being able to post is that our advice is not given as something that
must always be followed. Members are free to ask people who have responded
why certain things have been corrected, and others can come in to rectify wrong or misleading answers. If a response is not challenged, and if it has been 'liked' by two or three people you know to give accurate answers generally, then you can be pretty sure that the advice/information given in the post is sound.