Perhaps you feel that Preppers who do not wish to soley depend on the grid is a threat to your job security as an electrical engineer in the defense industry.
I also don't like the lecturing and the judgmentalism that we get from the prepper crowd. And I don't like having to step over a sick minded prepper article that fantasizes about my death every time someone bumps it to the top. And on top of that I think that prepping for SHTF is simply an unwise thing to do, because I think the risk of it is exceedingly small. I just think it's bad advice.
I think prepping in its hard core form is largely a mischanneled expression of frustration over the state of the country. It is not constructive, it saps constructive energies, and it provides an excuse for saying "to hell with it, let it burn" that in my opinion is simply not a good thing.