I don't see it as all that simple, it depends on the person and what their trauma is. A lot has to do with somehow being invaded and caught off guard and not having a way to self protect or have a sense of personal boundaries that others respect too. Also, it is bad enough to have a trauma that is so real and invasive, then developing PTSD makes it harder if the person is further abused or invalidated.

When someone has experienced a loss and develops PTSD, the last thing that person needs is to be told they "should not be suffering, what they have is not "real", what they felt was valuable was not, or don't beat yourself up as though it is the victims fault that they suffer. The last thing someone suffering needs is to talk about how they suffer and try to verbalize it and to have others tell them they are doing it wrong and "make it quick and simple or brief". The last thing someone with PTSD needs to hear is how what they say is not important, how they feel is not important and that "if" they talk about it whatever they say "will" be used against them and even twisted to convince others what they are saying happened, what they saw happen, all of what they lost is "not worthy of anyone believing them".