Really stupid Jon Stark plan.
But I actually think they might have been using dragonglass daggers, when they captured the wight and later, on the island.
However, the producers failed to make this clear to the viewers, which is as good as not using the dragonglass, as far as I'm concerned.
Here's another idea. How about bringing a raven along in the first place?
My guess is this is just one more HBO FUBAR again. No way would GRRM be so sloppy. If we ever get to read how he decides to gift the Night King with a dragon, which is the pretty obvious plot point in hindsight.
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