I think mind mapping has a fun part in it. Returning children, feels like we are children again. That makes work easier. Not only. To put ourself in this "beginner-state" let our brain work entirely, both left and right part together.
Mind map can be done on pc too...
That allows to fix what is wrong and to update the same map, but...it's limitated, and the limits are the limits of the software.
In my opinion...hand made mind maps overcome pc made mind maps by speed, by complexity, by fantasy, inspiration. Everything. But it's a point of view that,. I admit, it's involved with my personality.

Mind map helps activation 'cause it's radiant thinking.
I think photoreading works this way too. We have trigger words, we have question, we find out something in the book that "wakes up" something else, and then we think to something else connected and so and so. This is radiant thinking.