do you say to someone who is miserable at their job that they are stupid for looking at other jobs? or the many other situations when one is faced with a decision to cross another boundary of sorts? no.
and it doesn’t sound at all like he is afraid of the future. it sounds like he’s tired of the present. you, in your calling him stupid, seem afraid of the future. he’s ready to face it.
one should always be in control of their own lives. we were born into life without a choice. being told we have to stay here, in a prison state, without regard for our own choice is yet another layer of cruelty of the meta-life us humans have created. if we leave people no choice but normal suicide, we end up with sloppy exits that result in much more pain, lack of grace, and destruction than that of assisted suicide.