Is it bad that Muhammed(pbuh) married Aicha ?

[Mystic]

The Quran says the age of marriage is when people are at their most strength (prime). Sorry, that's well above 9, 10, 11, etc.  Exactly what age the Sunnah has designated in elaboration of this aya has also been perhaps lost, but perhaps not, if we look at hadiths that talk about the age in which the orphan must get his money (because Quran says that's at the age of marriage and the most prime) and they are reasonable.