Why are we shifting to fancy math for this? Just mandate districts have to be simple geometric shapes; good luck isolating 16 individual neighborhoods in a city

Why are we shifting to fancy math for this? Just mandate districts have to be simple geometric shapes; good luck isolating 16 individual neighborhoods in a city when all you have are four corners. I mean I know some mathematician will show that you can still tile them in such a way to benefit some candidate by 1.6% or whatever, but it would be the simplest way to get rid of the most egregious of district abuses. Remember, you also have to sell the idea to the public, and which is easier to sell: "Trust this complex algorithm built by mathematicians and their fancy computer models who most certainly aren't secretly biased toward the candidate you dislike", or "RECTANGLES! :D"