No kidding, but then, so is 100LL. And lets not even talk about hydrogen...
No, let's.
100LL is easy and safe to handle if done in an open space and you control ignition sources. We have about a century of experience handling, dispensing, and storing gasoline in a variety of environments. It's handled very casually with a minimum of training.
Pressurized gaseous hydrogen is even safer to handle - no worse than welding gases, and the same precautions. The main issue is pressure-vessel safety. Hydrogen doesn't "explode" - we're not talking
Hindenburg here. Long-term issues include embrittlement of metals, but that's relatively well-understood.
Ammonia is caustic on touch and an extreme inhalation hazard. It's highly reactive with all sorts of common materials. You'll never see open, casual, pumping of ammonia like gasoline, nor easy gas transfer and storage like hydrogen. Pure ammonia requires special vessels, transfer systems, and *extreme* precautions. It also has an inconvenient boiling temperature, making the choice of liquid or gaseous storage awkward. It's nothing to be casual about.