It seems like you are asking "Why was a method of writing adopted while others were not?"
To help me understand what you're asking, could you please tell me:
* What specific method of writing are you referring to? (e.g., cuneiform, hieroglyphs, the alphabet)
* What other methods of writing are you comparing it to?
* What do you mean by "adopted"? (e.g., by a specific civilization, by the world at large, for a specific purpose?)
Once you provide more context, I can give you a more helpful answer.