I have gotten earbud volume warnings while the volume is on max and I legitimately could not hear the podcast i was listening to because cars on the road next to me were so loud.
Beyond the obvious concern trolling and ableist implication that people with hearing impairments shouldn't ride, people who don't spend a lot of time outside of cars don't realize how loud they are.
This highway shoulder is the only bike route to UCSD btw.