Maybe because resumes/CVs go through Human Resources first, and HR people wouldn't know how to deal with one in JSON.
The industry could simply standardize a JSON structure and ask candidates to submit in such a format.
and that people with bachelors degree cannot teach themselves how to write simple JSON structure is laughable.
That's not the point. Would they want to? Would they need to? How many technical people would actually submit a resume or CV as JSON? This seems a bit edge case-y. Interesting, but edge case-y.