as with all medical equipment, your experience may not represent the experience of all who need hearing aids.
I use hearing aids, and without them, my workplace turns into a death zone.
Think about people working in public transportation with hearing disabilities.
Imagine if you are working in an Amazon warehouse where your hearing aid fails and you can't hear a mechanized forklift coming through, or you can't hear announcements pertaining to safety.
Even at regular office, I can't hear fire alarms without hearing aids so literally, if the hearing aids fail, and there are no flash alerts or smoke alerts, I'll just keep working through a fire alarm. Thankfully flash alerts are regulated and mandatory.