As you look ahead, you should keep these two things in mind.
The minimum level to graduate as an English teacher in Chile is an EFL-C1, meaning that those above the minimum, and those in "above average" or "bilingual" schools, will probably want an EFL-C2. How do you show you have this level? With a certificate.
Secondly, few school Directors, Academic Directors (UTP) or Human Resources managers know what EFL C1 or C2 really mean or if they do, have time to evaluate. So how they do they know a colleague's or candidate's level? They ask for a certificate.