I haven't seen any reports of injury or damage from sticking things in the ear. I'm sure it happens just not all that much, certainly not enough to say "NEVER DO IT!".
Traumatic Tympanic Membrane Perforations Diagnosed in Emergency Departments - PubMed
Otologic complications of cotton swab use: one institution's experience - PubMed
There you go. Now you have.
It's like saying don't drive a car or use a power tool because you could have an accident.
No, it's like saying don't use a power tool to clean out your earwax, because that's not what it's designed for.
The tools are there, they just need to be used properly.
I will ask @doctormike how often he treats patients who have damaged their ears with a Q-tip, versus how many patients say they use Q-tips regularly and are advised not to. My bet is more people are killed or seriously injured by falling vending machines than Q-tips causing ear damage.
I will take that bet.