Hello,

The IELTS exam score plays no role in determining whether you are eligible to work in an English-speaking environment. Therefore, a high IELTS score wont give you access to more job opportunities.

Instead, with a good IELTS score, you may be eligible to apply for visas abroad in order to avail opportunities in foreign job markets. The IELTS score can also be used to apply for permanent residencies in other countries.

Also, a high IELTS score may enable you a passage into IELTS preparation and teaching, but otherwise doesn't add to your professional qualifications.

No such correlation. Job opportunities are majorly based on graduating college, your academic scores, your work Experience uf any, Your functional domain knowledge and soft skills. 

IELTS exam is just gateway for admission to abroad colleges for MS /MBA .