Senju Hashirama was born in the Senju family during the Warring States Period.
In that era of constant fighting, men had to go to the battlefield, and women had to help treat the wounded in the clan, or be used as bargaining chips and sent to get married.
Senju Hashirama was originally going to be sent to the Uzumaki clan for marriage, but she didn't.
Because of her power.
Because he is the only one in the clan who can compete with Madara Uchiha next door.
What's more, didn't you see that the Uzumaki clan leader and Uzumaki Mito (male) both came to break off their engagement?
Concept: A relaxed, happy and different Naruto