I think I meant that the heels raised tests offers so much slack that even with tight hips you can still get into the position.  Now, it may be sloppy  and not fully ideal but it doesn’t truly show hip range of motion it just shows ankle range.  Essentially a heels raised position is how most people get down low.   It sounds like if ankles are so terrible that people haven’t even begun to deal with their hip issues.  In fact, is it even possible to deal with the hips if your ankles are so tight?  Perhaps the hips are not truly as vital for the squat as much as the ankles are.

I think iron_tiger addressed these question in my post ‘Ankle mob works the best for squatting’