Did you read your link? It actually does talk about the two sides specializing. Have you ever seen the people who had the connected sliced? You would never say that if you had seen the videos. There is most certainly differences in how the left and right brain function.

Its well studied and in fact has many benefits. You're just mad your cursive looked like shit and the teacher called you up to her desk in frustration as she tried to decipher an s from a r on your work.

Cursive writing helps improve brain development, memory retention, and fine motor skills.

Brain and Cognitive Growth

Stronger neural connections: Writing in cursive engages both sides of the brain, unlike typing or standard print.

Better memory: The continuous motion of linking letters helps students remember words and grasp new concepts.

Aids learning challenges: The fluid style helps students who deal with dyslexia or dysgraphia by treating each word as a single connected unit.

Motor Skills and Writing Ease

Finer hand control: Shaping connected letters builds hand-eye coordination and finger dexterity.

Less hand fatigue: Smooth, flowing lines reduce the stop-and-start stress common in regular print writing.

Fewer letter reversals: Connected motion stops young children from confusing similar letters like "b" and "d".

Practical Uses

Reading history: Knowing cursive allows people to read old family letters, journals, and major historical papers.

Personal signatures: It gives individuals a reliable way to sign official forms, checks, and legal documents.