Good visual explanations are useful to all learners. I'm sorry, but the concept of "visual learner" when used in contradistinction to "verbal learner" is just "lacks attention span to concentrate on something hard".
God forbid we show any kindness to people with attention deficits.
We should definitely be kind, to as many groups of people as humanly possible. But erecting artificial categories merely because someone thinks it will make some other subset of individuals feel better (a) is patronising to those people, and (b) introduces confusion for everyone.
Patience. These kind of work is not worth for verbal readers, but for visual learners and visual creators this is very educative. It's a work of visual learner and these kind of work will not stop.
> replace standard linear algebra notation with an alternative (but mathematically equivalent) graphical notation.
Yes. Modern computation is based on AI which is based on matrices which runs on GPU which does computation on graphical input. This work is a masterpiece for simple solutions for complicated computations.