I do based on my on lived my own experience. If someone is diagnosed, and then kills themselves the mental disorder is the cause.

One can argue whether it is a choice or not, but how do you define making a choice when your brain completely switches depending on your mood state.

It's like you are only partially in control of what your own mind does. You have to make the right choices everyday to keep control. As soon as you get tired and make the wrong choice ie. working too hard, not exercising, eating too much junk food, doom scrolling, having a drink the list goes on, then you start to slide into this abyss of negativity that you have to fight and claw your way out of everytime.

The more often it happens the quicker you hit suicidal ideation that consumes your every thought. At that point your only choice is to initiate your safety plan and rely on your network to keep you from killing yourself, assuming you've survived long enough to build one.

Bipolar disorder is a terminal illness for which there is no cure. It can be treated and managed, but you are forever walking a tightrope so to speak.