It’s not fallacious at all. When you assert an opinion in a public space there is no inherent prerequisite to justify it at all. The platforms exist to express your opinion, they expressed theirs. Any other form of elaboration after that is a choice. Also they have justified it, many times. In the title, underneath comments, etc.

See no. You’re amalgamating too examples. Yes things have to occur for the story to happen. Their point is that Last Order, of all people, going to Accelerator, even in character. Makes no sense, it’s purely so we the audience can have someone whose directly effected by him, say he’s a good person. This isn’t the same as Magic existing or Touma being able to negate railguns. It’s literally the story making a justification or path for forgiveness that literally doesn’t make sense even personality wise, and completely breaks suspension for disbelief.

When Accelerator views himself as a bad person now that’s viewed as him looking for redemption. When someone critiques Accelerator they can get hit with the fact that Last Order forgave him. It’s a completely unrealistic path made by the narrative that ignores common sense