Should I disconnect my auto correct?

It seems like more and more my words are being changed too much and I don't catch it. So, auto correct changes the meaning of what I am trying to convey. It just changed a word in my last opinion. The word but was changed to it. I don't want to proofread each and every word I type. On the other hand, I'm not sure what will happen when I disconnect it. What good is it anyway?
Should I disconnect my auto correct?
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