When Hurricane Maria hit us in 2017, we lost power for two weeks (we were extremely lucky in that - we were among the first 4% of the island to regain power due to our proximity to a hospital). During those two weeks, my entire lifestyle changed, obviously, so it's difficult to know what changed because of that, and what was just the fact that e.g. I went from sedentary tech work to nailing salvaged roof scrap on top…
FYI, that resistor was probably there to bleed charge off the cap when power was removed from the circuit, to keep it from biting. Rather than bad design, it's a standard feature; as you've discovered, big caps without it can be mean, not only to careless fingers, but to the circuit they're in, besides. Granted, it sounds like the resistor had failed short as you found it, and without access to a replacement, cutting…
Once I insulated around it so it could do what it was supposed to do, the zapper worked perfectly, and still works perfectly.