"apply to" vs. "apply for" an opportunity
One applies for a job, not to a job.
One applies to a college for admission (to an entity FOR something)
One applies to a bank for a job. (to an entity FOR something)
One NEVER applies to a job. A job is not an entity
A job is something you would like to obtain, so you apply for it.
Do you apply for benefits or to benefits? You apply for benefits. You want the benefits so you apply for them. You want a job, so you apply FOR it.
My understanding is such as "apply to an organization for a service". To obtain a wider range of employment, I think you need to apply for it.