Yes, it is important. A good introductory paragraph is needed for every paper. It gives the reader a reason to read your paper. It must be captivating in order to capture multiple readers' attention and for your opinion to be heard. :)
Very important. You need to have an interesting fact or opinion in your introduction to make readers interested and want to read more of your paper. If you don't, your readers might lose interest and not read your whole paper.