There must be a name for this sort of after-the-fact non-argument. Sorry, this is the only way I could find to describe it.
Debbie finds a kitten. Kitten has been burned over half its body, but it's alive.
Debbie says, 'The kitten wants to live!' and takes it to a vet.
Bob says, 'The kitten is suffering and will continue to suffer horribly, the kindest thing would be to euthanize her.'
Debbie refuses; the kitten continues to suffer for months but in the end manages to survive.
Bob says, 'The kitten suffered unnecessarily.'
Debbie then says to Bob, 'The kitten would now be dead had it been up to you. You have no respect for life.'