Here's why:
* Deafness isn't a job: Deafness is a condition, not a profession.
* The phrase suggests a choice: "Going deaf" implies someone intentionally chooses to lose their hearing.
Possible Interpretations:
* Misheard phrase: Perhaps the phrase was "going deaf from living" which might mean living in an environment with excessive noise that could lead to hearing loss.
* Figurative language: It might be a metaphorical expression, perhaps used to describe someone who chooses to ignore or not listen to others, but this interpretation would need more context.
To understand the meaning accurately, you need more information. Please provide the context in which you heard this phrase.