This is one way to handle it, yes. But this is treating the symptom and not the illness. Naturally, everyone is aware that we can stop playing at any time we want (I recently did, for about two months). But instead many in this thread are first asking "Why am I burnt out? Why is this happening so soon? So frequently? What can be changed to prevent it?" since we have no control over the game, we're trying to answer these questions where the developers can hear us or join in the discussion, so we're on the forums.
Telling people to take a break is like a doctor telling you to take painkillers for that pain in your gut you're having. It will help you with your symptoms sure, but eventually the appendix that Doctor didn't look at is going to burst. Taking a break is great, but it doesn't solve any of the underlying issues with FFXIV being brought up in this thread.