It is difficult to write in running script.
Cursive script: A style of writing for Chinese characters, characterized by a simple structure and continuous strokes. It was formed in the Han Dynasty and evolved on the basis of official script for the convenience of writing. There are Zhangcao, Jincao and Kuangcao.
Running script was produced on the basis of regular script. It is a font between regular script and cursive script. It was created to make up for the slow writing speed of regular script and the difficulty of identifying cursive script. "Xing" means "walking", so it is not as sloppy as cursive script, nor as straight as regular script. In essence, it is the cursiveization of regular script or the regularization of cursive script. Those with more regular script than cursive script are called "Xing Kai", and those with more cursive script than regular script are called "Xing Cao".
That’s why cursive script is more difficult to write. Cursive script is originally a kind of scrawling font. Running script is more formal and difficult to write well