In my case, I don't intend the labeling of something as one-true-wayism as being a counter-argument so much as it is an explanation as to why I'm not offering a counter-argument.
Because I view statements of one-true-wayism as not being arguments, so there is no possible counter-argument to them.
For example, somebody that says "A character tending to the campfire will have his weapon at hand", is not making an argument that this should be the case, they are stating that it is the case and have not provided any room for a counter-argument that suggests why it shouldn't be the case - so I say "that's one-true-wayism" to explain why I'm not saying "That's not true" and getting into the whole "Yes it is." and "No it isn't" repeated exchange, or worse, having whatever position I present that suggests contrary information scoffed at and labelled as being so off-base as to be an indication that, just as an example, "your PC should probably retire."