I think the job meant was pool operator, not miner as in, often enough, a mere hasher who does not even see the blocks being hashed. Such "miners" are more like bank tellers or even just folks who host an ATM machine for profit than actual bankers.
Yes, the common/general "banker"-word can surely subdivided in many specific categories. Currently "miners" can't really, perhaps only into these 2 (raw miner, pool operator), but as longer as mining evolutes as more specific sub-work jobs will show up, like in bank-business, IMHO. Compare bitcoin-age with bank-business, say, 1000 years ago. :-)But nevertheless, the general/principle equivalence/relation "banker" <--> "miner" holds perfectly. Probably, the miner-community likes to avoid the word "banker" for themselves because of psychological reasons.
smtp