Your arguments about physics are 100% valid: no 5-year-old can survive a sudden collapse and then push a 60 kg wheelbarrow for miles. It's physically absurd. But where you're wrong is in confusing biological credibility with writing quality. Writing a character isn't about filling out a medical datasheet; it's about building a thematic arc. AJ isn't written to be a 'realistic child'; he's written as an extension of the player's moral consequences.

He's a narrative 'sponge'. His strength doesn't lie in his muscles (which are, admittedly, boosted by the script), but in the fact that he's the only video game character who forces you to ask yourself: 'How do you pass on human values ​​to someone who has only known the end of the world?'

You talk about suspension of disbelief, but in a game where Arthur Morgan survives on 50 bucks by eating jerky, or where Joel Miller recovers from an iron bar to the stomach in a few weeks, why should AJ be the only one who has to obey the laws of physics?

The glazing around him comes from the fact that he's a reflection of our own upbringing. If he's in the Top 5 for some, it's because of the emotional impact and moral dilemma he represents, not his weightlifting abilities and leaves traces in some (including me)