No, this isn't a tshuveh in Igros Moshe or Minchas Yitzchok, and not even Tzitz Eliezer, and maybe we don't pasken shayles in halochoh from stories of tzaddikim. (maybe we do?) But it's still nice. It's from Reb Itzikel Amshinover's memoirs. Reb Yaakov Duvid was the first Rebbe of Amshinov. And those who'd like to can use this as additional proof. Additional to other proofs we've brought here in the past. Like Shlomo said: "In Vorke loving people was the most important thing in the world."