Hashirama the only Senju

[Son Ryuto Uzumaki]

Hashirama was the Greatest of his time but their was others greater than him before him for the simple fact of his tech and knowledge and time kids didn't get past 30 so not many have the time to step aside from warring to read the ancient text like Madara and hashirama= smartest in their time. So I believe Hashirama was different because of the Nature Chakra that flowed through his body=dna changed or strengthened and considering not many others used the same Nature chakra they didn't get the added effect's thats why Hashirama's body was probably so impor/emperior . I know you know this is my Hypothesis and not fact but it does correlate with everything we know so far