Well, yes and no. I didn't mean to imply this was a nuclear trigger. It was, as you say, an electronic part that controls the process to set off the nuclear trigger. But let's not underestimate the seriousness of this screwup. Yes, this is 60s technology, but the whole Minuteman system is 60s and 70s technology. And those electronics are part of the code system that is one of the most highly classified portions of any military system, especially nuclear ones. In some ways, release of codes or coding systems is almost more dangerous than release of the nukes themselves.
So, here's hoping some heads will roll over this and that procedures are tightened. After all, this is the second incident in a year, remember the six warheads flying around on the B52?