that's just a funny claim from multiple angles. a professional editor working with professional shot footage is an entirely different creature than someone that can work with a pile of footage with no guidance to create something. feature film editors are different from documentary film editors which would be closer to content creators.

a professional editor will take longer as they are laughing/crying about the dumpster fire of footage dumped into their bay. a content creator is just going to yolo jump cut their way through it with absolutely no regards for the same criteria a professional editor would be looking for. you know, things like continuity, different angles, cut away shots and other things to make a clean edit. so yeah, something you just taped on your system with no regards to normal production quality will take a professional editor longer just to get their head wrapped around it.