I don’t think it’s nonsense when it comes to dual layer media. Few makers manufacture it. Those that do make it do a terrible job of it in general. The only company that makes it consistently well is Mitsubishi Chemical Company, which is primarily sold as Verbatim media.
I’ve burned lots of Ritek dual layer media (the other alternative) and it’s been universally awful.
With single layer media, there are a lot more choices. Lots of companies make good single layer media. Quite a few make bad single layer media, too… but there are a lot of other choices.
I have a burner that does quality scans, so I know how bad some dual layer media is. If I can’t burn it without PO failures on any burner I have (and I have several), then it’s bad media.