English is not my mother tongue, but I would translate 外行的想法 as "unprofessional opinion" or "amateurish opinion". 外行 is the opposite of 内行, which means expert, adept, experienced, an expert, a professional, so the emphasis is as you mentioned on the fact that the person is not experienced.

English is not my mother tongue, but I would translate 外行的想法 as "unprofessional opinion" or "amateurish opinion". 外行 is the opposite of 内行, which means expert, adept, experienced, an expert, a professional, so the emphasis is as you mentioned on the fact that the person is not experienced.

English is not my mother tongue, but I would translate it as "unprofessional opinion" or "amateurish opinion". 外行 is the opposite of 内行, which means expert, adept, experienced, an expert, a professional, so the emphasis is as you mentioned on the fact that the person is not experienced.

English is not my mother tongue, but I would translate 外行的想法 as "unprofessional opinion" or "amateurish opinion". 外行 is the opposite of 内行, which means expert, adept, experienced, an expert, a professional, so the emphasis is as you mentioned on the fact that the person is not experienced.