I think this depends on what you're storing though.
Business documents, accounting records, family photos - sure you probably want to keep them safe.
But if my NAS is just 20TB of pirated movies and TV shows (not that I'm saying it is...) then I'm much more comfortable buying the cheapest drives I can find and seeing how it goes.
For me it's the opposite in a way: I need a proper remote backup of things like business documents and photos because they have to survive an issue with the NAS or my house not just a drive so local copies can go on "whatever" and something like cloud backup makes more sense to meet the reliability mark. Generally it's not tons and tons of terabytes which is great because the backup needs to actually be usable within a reasonable amount of time when I need to pull it.
On the other hand terabytes and terabytes of pirated content is a lot of work but not necessarily worth paying to try and to backup over the internet. I can redownload it if I need but I'd rather not do that because some crap drive or NAS I saved 20 bucks on died and now I need to spend a week rebuilding my entire collection. It doesn't need to be Fort Knox but I'll spring for a proper NAS, drives, and pool redundancy for this content.
Business documents, accounting records, family photos - sure you probably want to keep them safe.
But if my NAS is just 20TB of pirated movies and TV shows (not that I'm saying it is...) then I'm much more comfortable buying the cheapest drives I can find and seeing how it goes.