I remember watching a documentary about someone pursuing doctor-assisted suicide for a mental illness who ended up staying around for much longer than they had previously intended because having a guaranteed way out let them enjoy life more than feeling like they were stuck without an exit.
I do believe that, paradoxically, there are some people out there who would live longer if assisted suicide was available regardless of health status. I feel like some people ctb because they are worried about the opportunity passing them by, and could actually potentially recover/have some good years if they knew they had a way out at all times.