Have you ever seen ER, Chicago Hope, NYPD Blue, or Law & Order?
Doctor, police, lawyer, and fire shows, along with "FIRE Co. 132", are all extremely blown out of proportion for entertainmant purposes. What's left after those kinds of shows? Comedys, which everyone knows aren't real.
If the characters do everything by the real "book", talk in tech speak (terms like probie, knockdown, ripe, charged line) ect... potential fans who are not in those lines of work may not understand and get very lost. Sad maybe, but then, that's entertainment.
What makes FIRE Co. 132 (aka: L.A. Firefighters) different than the other dramas I have mentioned? Simple. Doctor, police, and lawyer shows have been done over and over. The people in those professions seem to have grown to accept that the entertainment level of the show exceeds the educational one. Many of those dramas become hits, despite some false content. These new shows are being based upon other doctor, police, and lawyer, shows of the past.
Firefighting dramas have been underdone, so when LA Firefighters came out, firefighters didn't really know what to expect. They didn't like it, because it didn't portray the career the way they felt it really was. See, they were basing this new show on the actual career of firefighting, not other firefighting series.
Every season, a new cop show comes out. Every season, a new lawyer show... Some fail, many succeed.
L.A. Firefighters failed in the United States. Why? Because it was not accurate enough. It is sad in a way, that people won't try something new. They'd rather cling to the same old worn out stuff.