There is nothing weak about suicide. Taking our own lives is hard as us humans are programmed to survive. I see the right to die as important, it isn't like we have an obligation to stay alive, it isn't weak just because we decide that our lives are not worth living. It is a human right to decide when enough is enough. Many people simply do not want to suffer anymore, suicide can be seen as a perfectly rational decision in many cases. People who say things like this are likely to be not suicidal, so they cannot comprehend what it is like. Terms like this are often used as a form of guilt tripping.
Personally I wouldn't see my persisting, the fact that I have not ctb yet as being either strong or weak. Due to the SI and the fact that society makes it hard for us to take our own lives, it is not weak, the fact that I am still here. For that same reason, I do not feel like I am strong as I feel trapped. I do not display any behaviours of strength, in fact I have basically given up on life and it is like I have already died, and yet I am still here because it is hard to ctb.