Comment by Closi

I think we can safely assume that OP was picking a bit of a ridiculous hypothetical example to make a point that it’s possible for something to be deadly and transmissible, although in nature Baculovirus in Caterpillars has a similar mechanism (encourages their host to eat a lot, then climb to the top of a plant so when it turns to ooze it infects others) or cordyceps although both of these aren’t as highly transmissible as they hypothetical explode virus.

But the Black Death mixed high contagion and high mortality as an actual example that shows they aren’t mutually exclusive.