The confusing thing is that there is a verb in English that pronounces "wind" with the same "I" sound you find in "kind, mind and, bind," but that word has an entirely different meaning. So, "wind" the noun, which you are asking about, is the breeze. "Wind" the verb means to wrap something around something else: a road "winds" around a mountain and a person "winds" copper wire around a spool. To answer your question as to why the pronunciation is different, I often find that differences in pronunciation are rooted in the history of a word. In this case, the word "wind," whether a noun or a verb, comes from the Anglo-Saxon words "windan" which evoked the image of a "twisting, turning, and weaving motion." The Anglo-Saxons also used this verb "windan" as a name for the breeze, which they observed could "twist, turn, and weave" through things. Chances are that, at some point in history, the English started using different pronunciations to verbally indicate a difference between the noun and the verb. If you want a good resource on etymologies, this is the one I used to answer your question: http://www.etymonline.com/index.php?allowed_in_frame=0&search=wind

Because English works like that. There are different types of sounds, even though you can have the same writing. For example, "food", "blood" and "good": the first one is "fuud", the second "blad" and the third is "gud".

Look at this the other way round. Remember that speech comes BEFORE writing, both in the evolution of a language and in the way that a native speaker learns their mother tongue. It's not a case of 'Why do we say this written word like this?', but 'Why is this sound written this way?' Say this word aloud. Think how it sounds. Then think about a logical way of writing it. There is only one way logical way of writing it, isn't there? W ... i...n..d. That's why it's written in this way. It's just a little confusing that there are other words which are also written like this but are pronounced differently. And, just to confuse matters further, there is also another word, the verb 'to wind', meaning to make repeated turns, which is spelt the same but pronounced with an /ai/ sound to make it rhyme with find, kind, mind and so on. But that's just the way it is. Sorry.

"King", "Sing" ..