Impacted Wisdom Tooth Removal!

Had 3 wisdom teeth removed 3 years ago waited to get 4th wisdom teeth removed because it didn't come out of gum yet! The tooth still hasn't came out but dentist recommend I get wisdom tooth removed, by being put to sleep because it's deep in my gum and my other teeths are shifting. Do I need to get wisdom tooth removed and what are the risks of this surgery? and if I decide not too, will my teeth continue to shift? What options do I have to get teeth back straight? Thank you for your answers in advance.

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