They used that argument for years to avoid doing WoW Classic, and then it was wildly successful when they finally did. Seems to me like the inability to consider how they could work this into their ecosystem is yet another indicator of how far they've fallen since the golden era.
They still hate Classic and can't stand that players prefer it, because it is less profitable per user. This is why they've done almost nothing with Classic+ despite players clamoring for it very loudly.
