Thats probably a bit of a fallacy. happy people that have been through shit learn to move past it. In a quadriplegics case they cant really move past it. and so the question continues. is suicide weakness when others can circumvent it and live a happy life despite their trauma
Again, No.
Plus, there are indeed individuals who are quadriplegic who managed to move past it, YouTube is your friend in this case.
Also, your view as an individual and the way you look at life plays a huge role whether you choose to move past your trauma or not.
The level of trauma also plays a role, not all traumas are the same. Someone who chooses to live after losing a pet, might choose to CTB after losing a child.
Who determines whether an individual is week to choose suicide? IMO, no one. Cus it's a personal choice, unless we're talking about suicide over silly stuff, like not having the latest iphone or something, but most people here are struggling with one or more serious issues.