It is! It is important to protect your time. For the same reason you charge people the right amount of money and use your time wisely, you want to spend your time well. Your time is your commodity, you can only earn as much as you can actually do! So, I am not going to waste my time trying to educate someone who clearly doesn’t care or who stand behind offering 2 cents per word because “it’s easy, anyone can do it.”
If that were true, you would do it yourself! Yours and my time and work is very valuable — just because something comes easily to you does not mean it is not valuable and precious to others.