Indeed it was my own reasoning. However, in order let the god help we had to improvise without any priestly lore or ordained authority to call on him. If Ranald had not responded we'd have squandered our chance to attempt a grounding. If we'd miscast our freeform theurgy in that environment it would likely have been cataclysmic. The god we called then predictably increased the risk level by stealing still more energy from Mork. "What if Mork had eaten your precious god of sneaks, Umgi? What then?"I doubt that Mathilde going "It was beyond me so instead of being arrogant derp I let god handle god power levels" would actually be viewed as a bad thing.
And that very much was a huge part of rationale, remember? I think Kragg can respect or at least understand trusting god more than fickle wizard bullshit. It's not like he is atheist or whatever, you know?
"Let gods help me with god bullshit" is absolutely reasonable.
Fair or not, I can only see someone like Kragg trusting us less after such a revelation.