Do we need to be a good writer?
Yes, being a writer is very important because most important parts of a job is knowing how to write well.
English is very important and is now an international language. If a company wants to higher a second language learner is having grammar mistakes okay?
No, grammar mistakes are not okay. Even if you speak perfectly grammar mistakes can cost you a job opportunity or university placement.
Why does someone need good English grammar and speaking skills?
If someone wants to travel, get a good job, or receive a higher score on their university exam it is important to master the English language.