I would define escapism as a way of handling with a problem by not handling it. Sometimes we are too immature to deal with it, so we escape, and other times we are too weak to handle it, so we withdraw from it. Escapism is legitimate as a source of coping when the problem is more powerful than us. Then, escapism is justified because why would one fight a battle they’re going to lose anyways? It would be a waste of time and resources to fight a battle with the knowledge one is going to be defeated regardless of what they do.
However, escapism is not legitimate when the problem is serious and when we can indeed handle with it with the power we currently possess. Then, the battle could be won, and thus the battle is worth fighting to be victorious over the problem. Why would one escape a battle one have reasonable chances of winning it?
By escaping from escapism, one refuses to escape. Thus, I escape from escapism by refusing to escape, and instead, I handle the problem at hand that needs to be dealt with and that is degrading the quality of my well being. Such problems that can be dealt with and have reasonable negative effect over our lives - such problems are not worth to stay for long. Even if there is fear, the fear needs to be surpassed, because the fear could be a minion of the problem.
Make sure you confront when should, and escape when should. The easier the problem, the more it should be dealt with; the harder the problem is, until the point of significant adversity - one should escape from it, gain the power required to deal with it, and confront it afterwards. This is about the problems that can be dealt with. Problems that are beyond our control and influence, regardless of their proportions, should be overlooked, because something that is uncontrollable and uninfluenced is invincible in comparison to us. Use your escapism for recharging, and determination - for victory.
In a nutshell -- don’t fight battles that are lost before you begin, and don’t skip a battle that is or can be to your favor with the available power and resources you currently possess -- especially when the potential losses are minor.