I Do Not Want That To Be True

I often hear people announce that they don't like something, or they don't want it to be true. This is a strikingly bad idea and it has no logical base. It's illegitimacy is demonstrated when that mindset is applied to a dangerous situation. Imagine there was a killer in your house; what good does not wanting the killer there, or not liking him being there do? The answer is: absolutely nothing. When applied to a serious situation, no sane person would accept that for even themselves. So why bother  trying to use it for other arguments? 

Additionally, it can only apply to things that one fears losing as in, "I don't want it to be true that my family member died (again, your desires doesn't effect the fact that the family member is indeed dead)," or "I want to have free will, don't threaten my belief that it does," or "I don't want to be descended from apes." This mind set does not apply to things that one wishes that one had as in, "I want to have chronokinesis" or "I want to have a million dollars." Your desires have no effect on reality. This argument is a very poor argument, in fact, it's not an argument at all, unless we take it by the standards of a whiny toddler. Please do not use this argument. I realize that it is a defense mechanism and all, but it holds no merit; it just makes you look like a silly person.