Reduced Stress

Multitasking is stressful. Your brain makes your nervous system stressed. You can't multitask and get a better result, use time more efficiently, or reduce stress. Single-tasking could lead to better results.

If you're a content writer with clients, you'll also need admin skills. This is especially true for solo workers.  The content writer plans each task and manages time by doing single-tasking. You can manage main tasks better without stress.