As like many others, my FAC air is one of the first I reach for out the cabinet.
Some of the environments I shoot a LR is a big no no but the FAC air is the tool.
Noise can be a factor too, moderator or not, I often work on horse land and again a LR is a no no.
FAC has its place and I don't disagree in what your saying WFE, but it all depends on what type of shooting your going to be doing? or again!! The tool for the job