One would certainly hope this to be the case, but it's hard to watch SG1 and get the impression that the ancients had much of a concept of defensive design.
On the contrary, my view is that the Ancients knew defensive design is a /hard/ problem, for higher level languages. The lower level parts (like the actual Stargates) had smart companion interfaces where the safety features exist. The fact that you can over-ride a safety, presumably if you know what it exists for and have a use case for ignoring it, is a good engineering feature for a device that might be used in more extreme circumstances. (Such as evacuating from an Ori invasion.)