From what I can tell about you, I doubt it was an accident.

I've had Shure E3c's that failed due to moisture and E3g's that failed for some reason I don't remember, at which point I swore off buying Shure products, even though they are one of the top audio reproduction companies.

I then got a pair of Ultimate Ear super-fi 5 pro ear buds. The solder connecting the left cable to the bud failed after 1.3 years.

I now use a cheap pair of Sony headphones. The sound quality is terrible compared to the Shures and UEs.