"What makes a freethinker is not his beliefs but the way in which he holds them. If he holds them because his elders told him they were true when he was young, or if he holds them because if he did not he would be unhappy, his thought is not free; but if he holds them because, after careful thought he finds a balance of evidence in their favour, then his thought is free, however odd his conclusions may seem."
— Bertrand Russell, 'The Value of Free Thought: How to Become a Truth-Seeker and Break the Chains of Mental Slavery'
Row, row, row your boat,
Gently down the stream.
Merrily, merrily, merrily,
Life is but a dream.
neuroplasticity & openness to experience is more or less a scientific way of saying: "the retaining of one's inner teenager (e.g. freethought, individualism, introspection, rebellion, thrill, imagination, curiosity, etc.) throughout the entirety of their existence." ...It goes without saying that those who retain self-awareness & freethought would naturally be more in favor of things like the right to die.
Even ravens exhibit a life-trajectory which bears striking resemblance to that of the common human: "Common ravens are known to steal and cache shiny objects such as pebbles, pieces of metal, and golf balls. One theory is that they hoard shiny objects to impress other ravens. Other research indicates that juveniles are deeply curious about all new things, and that common ravens retain an attraction to bright, round objects based on their similarity to bird eggs. Mature birds lose their intense interest in the unusual, and become highly neophobic." -- 'Common raven' wikipedia