>"Except that if you use a western keyboard you still need to learn Pinyin or Romaji in order to be able to type the language."
No you don't. I type in zhuyin every day. The sounds line up in order of the alphabet, starting with ㄅㄆㄇㄈ, in the left column. It's actually easier than touch typing English.
The standard zhuyin input is laid out on the keyboard in order. By in order, I mean it is in the same order as the sounds have been taught for many generations and still are today (https://www.youtube.com/watch?v=YlNGJzYJQDI).
It would be like if English speakers didn't use "qwerty" keyboards but instead used "abcde" keyboards. Touch typing would be far easier to learn. My computer doesn't have zhuyin printed on the keyboard, since I bought it in California, but I type zhuyin on it every day. Even before I could touch type, it was easy because it was in order.
No you don't. I type in zhuyin every day. The sounds line up in order of the alphabet, starting with ㄅㄆㄇㄈ, in the left column. It's actually easier than touch typing English.