In terms of our own personal timelines, I do actually agree. Ultimately- it's up to us.
I can kind of see the reasoning when other people lament a suicide, or even the accidental or natural death of someone. Have you noticed how they report on young suicides in particular? Most had 'glittering' futures ahead of them. Did they though? How do they know? Presumably, if their lives were already being severey hampered with things like depression/ major anxiety/ poverty- why would they assume these things wouldn't have continued to bother them?
Maybe they would have had a great future, maybe they would have been happy. Do they think they regret their decision then? Do they actually think that's possible? I guess, if they're religious, they may believe that. Maybe they think those poor soles are now in hell being shown on some future simulated display what their future on earth would have been. Personally, I doubt we feel anything at all after we die. I find it kind of weird when people talk about suicide implying it can be an action you can regret.
In terms of obliterating a potentially great future- it's a complete crapshoot! Most importantly- the person concerned clearly doesn't see a great future ahead of them. If they've lost all hope then, are they likely to even try to get to a better future? How many things in life just come to us without effort? Not many- I'd say- unless you're incredibly lucky and lucky enough to have people around you that can carry you through. I doubt many do have that kind of support. Even people who clearly did or do reach out for support don't always get it.
It has to be up to the individual ultimately. They're the ones who are going to have to suffer their life. Only they are going to know whether they can find things to make it worth it.
I agree though- people can struggle on with terribly painful health conditions. Clearly, they have a reason to though. That's the major difference I think though. Many suicidal people have lost that compelling reason to live. Plenty are simply carrying on because they feel obligated to or, they're too afraid (understandably) to risk failing a suicide attempt.
Once all reason to live has gone though, coupled with a regular amount of discomfort, then in a way, it's only a matter of time before a person decides to go. Surely, that's logical. No reason to stay, near constant poblems to deal with, very little pleasure gained from living, a sincere wish for it to be over. Why would they stick around?!!
I think where it does make a difference is when you have dependants. Either in a responsibility sense- children. Or, an emotional sense- people whom you think your suicide would deeply affect. I think in those cases, it makes sense to hold on (if you can) for those people. That of course depends on the severity of the situation the suicidal person is in. For me though- I believe it does matter when I go. I don't want to go before my Dad does. That's a personal choice though and I appreciate that not all people can hold on.