There is you not wanting to delete information from a public web service when they ask and there is people dying because you wouldn't delete information from a public web service.
Strange that you're worried about someone "reaching into your computer" but seem to have no problem using Discord, whose disrespect for personal privacy is legendary.
It's not your computer. The cloud, and discord is a cloud service, is always someone else's computer. If you want it be stored locally on your computer, use the discord data export feature or some other feature like it.
Also, Discord might be a "nice" company right now, but maybe it gets bought by facebook in 5 years.