Not true at all, at least in the sense being discussed here. What you're ignoring is player skill. The mechanics absolutely can be conveyed without needing Discord, and quite easily. The issue is people actually being able to do them without the real-time benefits voice chat provides. Things like Discord make it easier for people just learning content to get immediate reminders of important things, can help those who are easily distracted or have difficulty focusing to maintain that focus, and so on. But yeah, on this forum just random baseless bashing of game designers makes people feel better, I guess. Sad.
