It can be really helpful for the new players that got a lot of questions that are asked frequently, instead of answering 2-3 about a hour with the same question is just wasting time, and time is money. Back in my day, you need to ask someone if they know the answer, and if they don't know then you're going to make an army of Frequently Asked Questions. The person can be asked to answer thousands of question that are basically the same, the person can be driven to madness, and might just fall.