I think is probably one of the most healthy meditations a human being can do. You are preparing for things that will happen, before those things happen.
There is a near universal folk belief that you tend to get what you focus on?
Buddhism, in the suttas and in ethnic folk beliefs claims that focusing on metta will produce all sorts of good things.
So, according to Buddhism/Buddhists, why wouldn't focusing on death, sickness, aging, loss with The Five Daily Recollections and meditations on death bring more experiences of death,sickness and loss into a person's life?
I'm not trying to be incendiary. I've seen that many people are very uncomfortable with meditations on decay and death. I'm guessing that the folk belief that you get more of what you think about, at least on an unconscious level, is partially responsible.
I'm interested to see what Buddhists/Buddhism would have to say about if metta thoughts can bring good things, why wouldn't contemplating loss bring more loss?
In reading the scriptures, there are two kinds of mistakes:
One mistake is to cling to the literal text and miss the inner principles.
The second mistake is to recognize the principles but not apply them to your own mind, so that you waste time and just make them into causes of entanglement.