It is a completely valid decision by a person in sound mind to choose to end their own life. It applies to the ill and the well, it applies to prisoners and the free, it applies to thirty-year-olds and to centarians.
It is a decision that applies to one person only, and is a decision that should not be stigmatized or restrained by society, family, friends, or the well-meaning masses.
If a person in sound mind has decided that life is no longer worth living, that’s their decision. If a person who has decided that takes action, that’s their action. Not my decision, not my action, not my business.