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MC repairs the whole village, the villagers want to pay him back, and insist, he asks if they got any weird tool/weapon around.
MC is brought to a sealed cursed sword, after a ancient hero kileld a demon he gone berserker, somehow they got his weapon and sealed it.
MC is sad for it, for him tolls should be used, the spirit in the sword is angry and saddened for being sealed for a long time, MC says that for him holy weapons are trulty cursed as they can only be used from one person they choose, that to me sounds like bullshit, a weapon only the owner can use is the best, can't be stolen, cna be used to kill the owner, if the owner loses the grip in battle it can't be stolen or used to attack him, only advantages.
Maybe is a mistake in translation, but it didn't feel liek one, just the author trying to sound cool and saying something idiotic.
A holy sword is very powerful, it being able to choose the right person and not a violent piece of shit would be for the best.