If you have a net worth more than what it would cost to put you in the ground, you need a lawyer.
Almost every time I've been to update my will, we improve it and it more closely reflects my wishes. For example, I recently found out that if I were to pass unexpectedly, my FAMILY (with whom I do not have a relationship) would receive my home, NOT my partner. The lawyer also helped me find an equitable way to distribute my assets to my friend's children that covered more scenarios than I'd imagined.