Is the ink halo of calligraphy inscription a flaw?

Not a flaw.

Also known as calligraphy and ink painting. Calligraphy ink is produced in an extremely natural writing state.

Of course, it is mainly manifested in cursive works.

For example, in the works of Wang Duo, a calligrapher in the Ming Dynasty, there are many ink paintings, and even a brand-new ink painting method was invented, which makes the works look magnificent, colorful, with block effect and shocking power.