I dont think you can argue your position without reverting to a sunken cost fallacy or an ideological ignorance of the amount of suffering inflicted through simple existence, even in the best of circumstances.
If you want to argue that suicide is always an option, let me remind you that this is how the Romans justified the conditions of slavery.
I could always be wrong here, but i dont think you are able to explain how. To put it bluntly, fanatics never can. Or want to because they prefer feeling right. Pls do explain how i am wrong here.