As a content creator, I do use torrents to send bigger files across the pond or to other continents where internet connectivity is not that great. One big advantage of a torrent is that you can resume it, if you've lost your connection. Another one that it's free and there is no size limit. Sending files >15GB over something like wetransfer often doesn't work when connectivity at the receiving end breaks down after a few gb - same with .ftp where not every client can resume an interrupted download and not every client of mine is able to download and use one which does. icloud drive is often too slow and downloads are then interrupted as well, because it takes too long (e.g. when the ip of the recipient or sender changes automatically every 12 hours, or sometimes it feels like they are just not very stable and stall after an hour or so).
Granted, I usually wouldn't use a phone for a 16+ hours torrent-upload, but I would, if I'm e.g. abroad in a remote location but have filmed something long and newsworthy I want to send to my work. Although, I'm not sure one can create torrents with iTorrent - haven't tried it yet, because iirc it was in beta and required one to be a paying patreon customer of the developer.
Sure, but let's also get real here: If you're a content creator who does his own content, and has to pay the bills from selling that, piracy is usually not an issue. Nobody is going to pirate the ad you're producing, nor will somebody uploading your songs hurt your personal business. If you produce something that has a real demand, there's more than plenty of income from youtube and streaming services. If you just hardly break even, there won't be enough interest to create enough piracy demand to hurt your barely existing business. The only ones that are afraid of piracy are big companies who dream up some imaginary lost sales in an ideal world where population has grown but the audio cassette and streaming services have never been invented. At least that's my impression, as someone who has worked in the film and music industry on both sides (small creator & big label) for 25 years.