Lies, damned lies, and statistics. 15+ is extremely easy in the current meta. I’ve often timed them as the top heals and/or top DPS and I’m the tank.
This isn’t because druid is OP it’s because a good portion of people timing 15s are bad.
The only reason 10% have completed a 15+ is because the amount of time it takes.
Half the games I own (other than Warcraft) only 50% of people play to get the first achievements in the game (like killing the first boss) and only 5% of people beat some games.
To be honest, I thought it would be much lower than 10%, considering the time and patience required.
10% shows how easy it truly is.