Well sage mode does increase durability, speed, senses and strength. Naruto fell high upon a spiked earth and came out unscathed. Madara did say it wasn't a lot but enough to handle things when he took Hashi's sage chakra. Jirayah didn't take serious damage until he turned his back on Pain thinking he had won. Also he wasn't with ma and pa the entire fight.
Maybe Hashi's sage chakra and body is activated on a higher level than that of Naruto's.
I really hate to even attempt defending this shit though.