On Stack Overflow itself it makes perfect sense to link to similar questions and say that the user might get better results from searching those results first and can likely find their problem already solved.
However, for Code Review, it isn't the intention that people need help with their specific implementation, and even if their goal is similar to others it's valuable to get someone reading over their code. It's a slightly mixed signal to think that the intent of the site is for other people to review your work for feedback but then when typing up a question to ask you're told that you maybe shouldn't bother because other people got feedback on their solutions.
I think it's valuable to have the links. I just wonder if the phrasing of the text might throw off the beginners that need help the most.