score:5
Most countries don't put "occupation" in their passports at all.
Given the frequency people change jobs or careers in today's world, I think most western countries would find it completely unreasonable to consider a job change to invalidate someone's passport.
Any "occupation" notation in a passport will be taken as an indication of what the holder's job was when the passport was issued, rather than as a commitment to stay in the same job until the passport expires.