I'm going to Ha'tak my ire out on this thing

I mean, let's face it. None of the Goa'uld tech was particularly... good. They got by through terror and subjugation and keeping their slaves technologically stunted. Yes, yes, yes, the staff cannons are terrifyingly powerful... and ridiculously inaccurate, which, I guess, only makes them /more/ terrifying in terms of "collateral damage".

And, really, the inaccuracy makes a /lot/ of sense when you step back and consider that most combat between Goa'uld System Lords was largely symbolic, and no one involved wanted to lose any more jaffa than was strictly necessary to keep the rest in line and open up promotion slots for them.