I don't do gathering either. It's kind of a feedback loop with crafting.
I don't recall it being an Echo ability, but to my memory it's what the Azem magick does. Azem's magick allows us to summon "allies" from across time and space, with "allies" not necessarily being limited to people we've already met. That's why it lets us summon random people instead of adventurer allies we've specifically already met - it can be directed to summon specific people (as in Ultima Thule) but will otherwise summon anyone willing and able to help us when invoked.