^and that right there shows how you shouldnt be looking at a story.
justification doesnt quite work right cause that considers that every individual will make the best decision, when in reality we often make really bad ones with poor(aka no) justification. you can easily make arguments blahblah on how X character should have chosen ex. sacrifice for the better good vs. following your desires.
each side will have their points, but judging from your post, id say your going for the sacrifice for the better good, right? so would that negate the other choice? yeah no. why does someone have to follow what you say, because it would benefit you? shouldnt it be beneficial for the the person choosing, because its their choice? shouldnt it be what they would want and not what should be needed? or in reverse, it should be needed and not what they want?
what is should be used is an explanation, because justification implies that your choice is the best one you could do, which is debatable. things may have gotten worse actually if they chose the other option, because there's no proof there's no better option.
even if blossom is a genius, people can make mistakes. it could be a mistake that she knew, or it could be where the consequences were a lot more dire than what she intended. heck, its possible that the destruction of megaville wasnt directly related to her choices, it could have been someone else who caused it and him just used the chaos for his benefit.
and asking for justification then saying that there would be none possible really shows how willing you are to understand, right? its not that your already rejecting whatever bleedman has to say, right? yeah...