I don't know what your professional role is, but have you considered that you are not exposed to every type of person who acts on suicidal thoughts or dies by suicide? Are you perhaps more likely to come into contact with those who have more intractable problems?
I work in an area where I do encounter people who have actually died by suicide. Typically under 25s. Young people with full and bright futures going through acute distress who have taken actions that don't need a lot of planning but through their violence tend to be fatal. I also contemplated suicide and made suicidal plans when I was younger and now my life is fine and I have no mental health issues at all. Fortunately, I never was very impulsive but maybe if I had used alcohol or drugs at the wrong moment, or maybe if something very difficult had happened in my personal life to increase my distress, if I lacked protective factors, or maybe if I had been a young man instead of a young woman - my story could be different. Over. Would you encounter someone like me in your workplace?
When we tell people that suicide is inevitable, and might even be for the best, we risk contributing to the hopelessness and isolation that people with suicidal thoughts may feel, reducing the chances that they do seek help, reducing the chances that they survive. Suicide isn't a good option for the majority of people - I don't think that's a controversial statement. Suicidal thoughts can be temporary, can pass, and can be survived - that's not the same as saying they aren't serious or are a whim.
I think it's very important not to conflate the issue of suicide, which is typically (not always) related to irrational thoughts caused by an acute mental illness or distress, with assisted dying. Here I have been talking about the fact that suicide is preventable and should be prevented in a majority of cases and this really has nothing to do with assisted dying.
Interminable, untreatable suffering caused by physical or mental illness is the reality for some but not the majority. It's rarer than having suicidal thoughts - which aren't uncommon. Even acting upon suicidal thoughts is not uncommon. People can and do act upon suicidal thoughts, in the absence of intractable illness or suffering. In these cases, if they die that is a tragedy. Because if they survive, they are likely to recover.
There are different groups of people who act on suicidal thoughts for different reasons. The narrative that suicide is a good solution to intractable suffering, is a pro suicide narrative and I fear you are treading into that territory. I am not trying to undermine your experiences but please consider that they may not fully cover the full range of people who act upon suicidal thoughts.