That’s definitely part of it for me: I don’t have particularly high trust for burned DVDs. I’ve had glitchy TV DVDs that a friend burned from his DVD DVR type device in the past. Digital content that goes on to my computers is at least stable on the RAID, and potentially triply backed up locally and in the cloud.
I’m also increasingly surrounded by friends and colleagues who have roughly zero interest in physical media.
YMMV
I generally don't trust any media burned by others either, primarily because they may use cheap blanks and burn at faster speeds. However, I've had much better success with what I've done myself. I typically have backups on portable hard drives, as well as burned disks. Lately, I've been using Verbatim 25G BD-R's for the additional space and the fact that they are price competitive with DL DVD-R's. IMO, the hard drives will crash before the BD-R's or DVD-R's will go bad.