Yes. To me, everyone who is adult should have the right to decide. In my opinion, even some below 18 people should have the right to suicide if they have severe enough health issues, such as agonizing cancer that won't get better or another terribly painful or sickening health issue. I myself have been through so many health issues form a young age, and wouldn't wish it on anyone. My intestines stopped functioning right at age 13, and I have needed to take laxatives every day since then to keep my system going. I will need them for life to survive. Before I was on them, I hadn't been able to have a bowel movement in over a week and it was agony. I only weighed 78 pounds. Then, at age 16, I began passing out around 5-10 times a day and felt terribly weak all the time. It was because my blood vessels weren't constricting enough to maintain blood pressure, so I was put on a steroid medication to increase blood pressure at a dose of 3 tablets, and the meds cause brutal insomnia and worsen mental health. My body improved on it's own in this regard some over time, and I only take one of these pills a day and it's not as bad.
Seriously though, this much physical suffering is not really worth living through even if you are not incel. If my parents weren't here back then, I 100% would have roped because I wanted nothing more than the pain to end when every day was agonizing.