It's up to us whether we end our life. Discussing the reasons for doing so, is harmless. And, if it causes someone to reconsider their reasons, it might even be beneficial.
I've already given an example of what I think is a good reason. For comparison, here's what I think constitutes a bad reason: Someone forgot their umbrella and their hair got wet. Even if they hated their hair getting wet I would say that it didn't provide a good reason to end their life. I've chosen an extreme example to make a point, i.e. there are bad reasons.
The person has a disabling mental health condition and has been living under extreme financial stress for many years. The person lives in a first-world country where not everyone gets healthcare, disability is difficult to get without major support, disability is not actually enough to live on anyhow, and the vast majority of "comfortable" people have no understanding of what it is like not to be. The person (some years ago) attempted treatment at their own considerable expense. Medications didn't work and/or had medically adverse side effects. Therapy was counterproductive. There was no more money to spend. The person holds an exploitative WFH job (no benefits, not full time, periodic layoffs), becomes more and more isolated. The person is at a point where ADLs (bathing/laundry) are somehow "impossible," and leaving the house to be among people is extremely stressful for multiple reasons (have to bathe, have to have clean clothing, have to manage to show up somewhere on time, have to be around people). The person is at a point where the only thing getting done is work. The person has to leave the house for an appointment and is worried because they know using the time and ENERGY (physical and mental) to get ready to go, go do it, then recover from it will make it hard to finish work. For superstitious reasons/self comfort/effort to bolster self esteem, the person decides to wear the wool fedora given to them by their deceased grandfather.
Despite best efforts (that were exhausting), the person is late to the appointment, and there are—at a minimum--social consequences for that (palpable disapproval, the knowledge that others were inconvenienced, etc.). The appointment is exhausting/stressful/difficult due to trying to front being a normal person, failing, knowing they were failing, knowing others were disturbed, shame, etc. On the way home, it starts raining, person forgets they're wearing the wool fedora while ruminating about awkward moments during the appointment, their distress over their inability to be on time, their distress that others do not understand loss of executive function, etc. The person then starts having negative thoughts about their inability to plan ahead enough to check the weather. Similar things have happened in the past. The person thinks they should have learned from past experiences and is feeling self-loathing/disappointment. The person realizes they're wearing the hat, and the hat has been ruined by the rain. They're devastated. Maybe the hat could be resurrected by a hat expert somewhere, but that is expensive and there is no spare money. There is no one to talk to who will actually understand why the loss of their grandfather's wool hat is devastating. For years, there has been no one to talk to because the issues are unrelatable, and the explanations are complicated and invite judgment.
The person commits suicide. Out of being exhausted, having trouble concentrating, whatever, the note simply says, "Well, I forgot my umbrella today, and my hat got ruined. That has caused me to realize that my life truly is not worth the effort of living it." People talk about the way this person died by suicide for a stupid, impulsive reason.
Yes, I know the example was about hair getting wet and not about a hat getting ruined. I'd guess there might be a situation where getting your hair wet is also a big deal for some reason.