Why do you need fairies?

Answer 1

The original fairies, or faeries, are said to have bestowed gifts upon newborn children, such as beauty, wealth and kindness. In the subsequent centuries people continued to believe this original function, but that they expanded their activities into other types of meddling in human affairs. Fairies can only be seen clearly by animals and seldom by humans, although if one is fortunate enough, one might catch a fleeting glimpse. There are a few exceptions however. The first is when fairies use their power (known as 'glamour') to enable a human to see them. Also, during a full moon on Midsummer Eve a mortal (human) might witness fairy dances or celebrations. And finally, by looking through a self-bored stone (a stone in which a hole has been made by tumbling in the waters of a brook; not found on a beach) one can see fairies distinctly. The rulers of the fairy races are Queen Titania and her consort Prince Oberon, their court being in the vicinity of Stratford-on-Avon. Other synonyms and euphemisms for fairies are: the Little People, the Green Men, the Good Folk and the Lordly Ones.

(REF: Encyclopedia Mythica)

2nd answer: We do not need them personally. The world needs them. They are caregivers of nature. The best thing the human race can do is leave them alone, unless you are a lover of nature and can be of some help to them.