Different use cases.
It’s not like your uploading and downloading gigabytes to it to use ffmpeg. For that you use something local. This is for converting smaller files conveniently. For example from a laptop and you don’t want to use a public converter that might keep the content.
If you regularly convert certain file types on a computer, dedicated apps tend to be better than these combo ones anyway.
I envy you for not having seen KonoSuba(The bottom one), you’re in for a treat.
It’s a comedy set in a fantasy world and is basically making fun of anime tropes while still being compelling.
Benefit of data managers: Tags for easier searching and grouping, grouping that is folder agnostic, easily choosing a thumbnail, and in text focused ones you can usually search the content of the files from one location and easily look through the results for the correct one, etc.
It would heavily depend on context and the situation. And in addition to the other replies, I think it would differ based on if Frieren was alone or traveling with someone, and who that was.
If she and Fern met them at a resturant, things might work out. But I don’t think there would be much left of them if she met them alone on a remote path. At that point she’d probably attack first and ask questions later. Although she might hesitate to harm him in the process. So yeah, it depends on how they meet and if she or someone else with her can detect the difference.