How many times have we wished something to change but nothing happened?
How many times have we made a wish and done nothing ourselves to get the wish?
How many times have you wished and it came true?
Like you have to buy a lottery ticket to win the lottery.
Keep trying different things and eventually you'll get to where you want to be.
A wish can give you hope for the future and keep you dreaming of better things. It wont make sadness go away but, keep you souring on for better future.