Yes, I agree, and I couldn’t care less about mythic raiders having more gear. The problem is that this is a disaster if raiders can bring that gear into keys when mythic+ players don’t have access to an equivalent. They already have a huge advantage at the top end due to broken trinkets basically every season, and to a lesser extent, the tertiary items.
I support this separation, and always have. I absolutely cannot stand raiders that come into keys just to get gear for raid