Hi Chrisir - I’m pleased 2d-arrays are easy for you.
But for many young coders, and adults very new to coding, what you describe is too much of a barrier - I speak from over 5 years experience teaching both of these groups.
One of the central pillars of the Processing Foundation was inclusivity and accessibility to newcomers and non-technical artists - and that is the only reason I raised my suggestion to make arrays easier.