because sometimes you run things that don't really need monitoring.

I run bunch of websites for pet projects and for friends clubs etc. They don't need monitoring, and even if they go down for couple of hours (or days) doesn't really matter.

I do monitor them, but mostly as an excuse to test various software, that I don't get you use during my day job (pretty sure that bunch of static sites and low use forums don't need elstic cluster, for log storage :) )

And sometims you simply don't have the time to deal with this right now. So you do a quick hack, and do it later.