?

If you walk into a mass shooter's house and find 100 different models of assault rifle, is that scary?

None of those weapons will have been used, since, you know, they're still stacked up at home. Unless this is the Matrix, or the individual is some kind of Lakshmi-Rambo hybrid, then any number of weapons left behind at their home is not 'scary" unless it signifies accomplices or a larger network.

For now, the takeaway from the pipe-bombs is that this was something they had been planning for a while, but probably without much or any outside assistance or training.