User blog comment:IamJakuhoRaikoben/Chapter 515: I Am You... You Are Me, Review./@comment-4829046-20161222002148

This was unbelievable.

The parallels Irene's life has with Erza's are quite thought provoking. They may have disowned each other, but they have so much in common beyond just genetics.

Also this made me remember something. I don't know if it was brought up because I don't have time to read all the comments.(even though today is the last day of the college semester XD)

Pretty much all the current big human fighters, the ones that are legitimately forces to reckon with even without bullshit powerups, are basically from completely different generations. The Dragons Slayers(1st and 3rd gen), Acnologia, Zeref and Irene are from 400 years ago. Erza's cells are at least 400 years old too. Mavis, Warrod and Precht are from 100 years ago. (note: Idgaf about Gray)

Basically, current generations i.e. generations born in times of relative peace and human superiority, are complete shit. However, it is not about experiences and circumstances alone. Natsu and Erza prove that it is in their goddamn genetics.

^just some possible ways to justify plot armour. Just sayin' ;P