It's an appealing idea, not least because it seems so bizarre.
Korean is almost phonetic but it's very recent (1443-1444) and it's influenced by the Latin alphabet family (should I call it Phoenician). It's not a direct copy, but it's not an independent invention.
The Japanese language is mostly logographic, but they have two second class syllabic alternatives for students, kids and weird words. They have no traditional phonetic system.
If I can add a personal anecdote, I speak Spanish that is a very regular phonetic language like German. When my daughter was learning to read we have to teach her all the combinations of each consonant, for example "ma, me, mi, mo, mu" and then "la, le, li, lo, lu", and then ... after a few letter we imagined that she would pick the regularity and then with a single example like "ba" she would complete the sequence but no, we had to tell her the whole sequence "ba, be, bi, bo, bu".
This is similar to the system used in schools, so I guess it's necessary to hear all the syllabic combinations in spite when you are grow up you my think they are easy to interpolate.
And remember that Spanish is like German, you have a straightforward relation between the written form and how you say it. [There are minor pronunciation details, as in any language, for example we sometimes drop some unnecessary letters.]
This is one of the things I love about Spanish. I've heard people say that English is easier to read than Spanish. I don't know what those people are smoking, but I think it would be too strong for me ;-) Seriously, how would anyone know how to pronounce words like "enough" without hearing them first?
(It's also the answer to "yes/no" questions. Answer in a sentence, don't just say "yes" or "no". There's rules about how English speakers use them "yes" and "no" and when we use full sentences, but if you're asking me, the answer is just "always say 'i do' or 'she won't' or whatever", because it's 100% guaranteed to be clear and unambiguous. It's also easier to remember in the heat of the moment despite the complexity. If you want to be really good, you can practise "no, I don't", but leave "yes, I do".)
I've dabbled in Japanese, German, and Spanish. All of these languages are easier to pronounce than English - and English is the only language I'm fluent in!