To Non English Users
Mistake is inevitable, if there is no mistake there is no correction, that is, people make mistake and through the mistake, corrections are made. Most users submit their post without cross checking the write up. So in many times omissions occurred and some ungrammatical statement occurred and English speaking users see them as trash, shit post without correction. It is better you reread you work before posting to avoid mistake. Be a good poster. Avoid mistake. But mistake is inevitable. It most come but not always.
OP, you are very correct on this topic of yours. As one needs to be careful and not rush into posting because sometimes,you might think that you post is quality enough but full of mistakes. When you use the preview method to go through it again,then you will see the errors and correct them. However if the information that you are passing can be understood by readers then it wouldn't be a problem to the forum.
Better always to proof read your sentences before you try to post something so that you will know that there's something wrong with our post and to make sure that there's no misspelled words so that it will be easy understand by other people who read it. Also we better accept peoples opinion if there's someone pointing out about posting mistakes that need to correct since by this we can improve our posting and the way we communicate with other people.