Normally, I’m not a fan of these posts but there is definitely some truth to this.
There are a bunch of people in this post explaining how you can easily down healers as long as you perfectly line up your CC and then burst accordingly.
The fact is healing is stupidly easy compared to dps (and this is coming from someone who heals Arenas). An extremely average player, who makes multiple mistakes as a healer can survive multiple CCs and burst from DPS well above their skill level