Well, they've worked just fine for me and millions of others (it's their most popular use). That said, there are indeed accidents from misuse.
Not sure what other people buy them for in the billions and have them at every bathroom. Cleaning vinyl records and nails?
There are specialty items mostly commonly used for the latter (cotton pads), and I'm not sure the reason almost every household has cotton swabs in their bathroom for fringe activities like: "taking samples of fluids for medical purposes (e.g. DNA swab), cleaning small items such as jewelry or electronics, applying glue in arts and crafts".
That leaves "applying makeup" as the other main use.
Cotton swabs aren't as precise as a Q-Tip for some types of cleaning/detailing.
At least, that's what my sisters tell me, both of whom get regular build-up of wax in their ears.
Now I love background noise because it's the only way I can escape tennitus (I hate headphones)
Do you really need to drown office noise completely through maxed out music?