So, so true. The argument that dying is the best thing that could happen to the experiments, or that it would be a mercy strikes me the wrong way. In fact, I feel like that way of thinking demeans and disregards the humanity of the toys so much.
It's like Doey said: 'We're more than things gone wrong. We're people. Can't you see that?' Emphasis on 'people'. If you came across a group of humans living in squalor that kept on going despite their dire circumstances you would not think for a moment to 'mercy' kill them without even considering their wishes. In fact, the mere thought of stripping them of their agency in such a flippant way would be abhorrent.
So why is it different with the toys? Why does Poppy's plan focus on saving the orphans and killing the rest? Are they not human, too? Aren't they children as well?
'The BBI research must be destroyed so that the experiments are never done again'
Chapter 5 completely wrecked that argument. Not only did Eddie survive, but the BBI is international. They have partners all over the world including a new sequelbait park in Japan. So there's no way they don't have the means to repeat the procedure.
'If they left they would be experimented on again.'
IF they were found out AND if they were not deemed human enough for ethics to apply to them. But even then, so what? They're already suffering as is. Starving, hiding, fighting for scraps. Wouldn't you try for a better life even if it meant danger? Gentle John and his group left a decade ago, and nobody has come to the factory to retrieve the rest of the toys. That means they did successfully stay hidden from humans or whoever found them wasn't interested in getting more.
AND, even if that wasn't viable... couldn't they just get food from the outside? Couldn't the employee act as an intermediary as to not arouse suspicion? Yes it's riskier than staying hidden, but it beats starvation...
Let me remind you Poppy's plan has not received support from ANYONE in the game. Not Doey. Not Giblet. Not even Lily. The game paints it as an irrational, rash and thoughtless decision. WHICH IT IS.
And I don't hold it against her. Actually, I think it's perfectly understandable for her to react that way after spending years locked inside a nightmarish case. But that doesn't discount the fact that it's a terrible idea.
So please, stop saying that dying would be a happy ending for the toys. There would be nothing happy about that. Not a single thing.
TLDR: killing the toys as a means to 'end their suffering' is not a happy ending and in fact goes completely against the core themes of the game about the toys conserving their personhood and humanity despite the cruel experimentation they were subject to.