Psychology says people who write too fast and end up with bad handwriting aren't careless, they may simply be prioritizing ideas over precision

Psychology teaches us that everyday habits often reveal hidden mental processes. The handwriting itself is rarely the real story. Prioritization is. For many people, writing quickly is not a sign of carelessness. More often, it reflects a brain that is focused on capturing ideas, keeping pace with fast-moving thoughts, and placing greater importance on information than perfection.

Raccontata daeconomictimes.indiatimes.com