The inside half is very important. However it is a complimentary simultaneous movement rather than a primary movement. While having a lazy or derelictuinside half has its consequences, so does having an overactive inside half. Leading or moving first with the inside causes problems as well. We must sequence our movements based on outcomes not technique or dogma.
What problem do you believe arise from an overactive inside half?
IMO This is philosophical and conditional.
On one hand, an overactive inside in terms of tipping and/or toppling into the new turn is a shortcut that is dependent on force generation potential and the skill level and confidence of the skier. Nothing wrong with that.
But to advocate such a movement pattern as the fundamental way to initiate a turn has its shortfalls.
Any movement to the inside without the needed technique and velocity to create centripetal force is inviting a potential face plant. I challenge anyone to tell me that moving inside, be it ankle, knee or upper body, while under the influence of gravity, will result in pressure being directed toward the outside ski.
These are the issues that get raised when we fail to contemplate that skiing involves various forces with different origins and varying intensities.