People just keep using hype as a way to make a character win without even considering their abilities.
We saw what hashi could do against hiruzen which wasnt really impressive,gaara can easily fly above hashi's trees,we have no idae what happened with madara,but just becaue hashi beat madara dosent mean he bats everyone weaker than madaa,this isnt dbz,his moukton was perfect to counter susanoo as it supresses pure chakra. Gaara's abilities are very suitable for taking hashirama,as he can also control the environment,has high chakra reserves,can fly,can sense very well,has a way to kill hashi hile ignoring healing jutsus,can summon large waves of sand in one panel.
Gaara had the right skill set to counter joki boy,wile muu even with jinton couldnt all his life,does that automatically mean gaara>muu?,yamato could supress the 4tk naruto,but kakashi couldnt,does that mean yamato>kakashi?,and how do we know hashi's mouktin is far better than what madara showed?,madara was an edo,he could put large amounts of chakra without flinching,tsunade made no mention of it being far weaker than hashirama's version.
Hashirama's hype is very high,but his actual showings against hiruzen were very low.
Flight renders moukton near ineffective,and gaara can attack from his sand sphere easily,his sand burial will make healing useless,until we see more of hashi,gaara wins high diff.