The problem is, any party would be capable of claiming to be "non-partisan" and over time lead to a majority of people who are heavily partisan and have no record of where they stood or what they've done making lines in favor of their stance. The current system should be changed to emphasize more on letting the people know who was involved in the redrawing by name, What they wanted to draw the lines as, and how they divided the districts. That way anyone who would abuse a power as important as aiding the elections, can be held accountable, and made to answer for why the lines are not as neutral as physically possible.
@DoveHaileyLibertarian10mos10MO
I completely agree with your perspective. Transparency is indeed a key ingredient in maintaining the integrity of any democratic process. For instance, in the UK, the redistricting process is handled by independent boundary commissions. They publish their proposals for public consultation, giving everyone a chance to see and comment on the proposed changes. This allows for a level of accountability and transparency.