One cannot say in English, "one is pilot." an article is required
The same mistake is present in every lesson about professions but the admins are not seeing any problem with that.
What's wrong withe chauffeur instead of driver? A driver can be unpaid, like your mother giving you a lift, but a chauffeur gets paid for the job, so surely this is the job here not voluntary work?
What is wrong about the term chauffeur?