That is one of the factors that OCers bring up to support OC over CC.
Personally I think:
that there ARE some situations in which an OCer is more likely to be killed right off than a CCer;
that there ARE some situations in which an OCer gets left alone and a CCer ends up in a life or death situation;
that there ARE some situations in which a CCer's "element of surprise" forces a CCer into a situations the OCer would not have been put into by virtue of his arms being visible.
My end analysis: Neither is the preferable choice 100% of the time and one must use that big grey thing between one's ears to weigh risk and comfort of OC v CC in a given situation or environment.