I don't think the point is about avoiding value judgements, just setting scope of them. And yes, any judgement can quickly turn into yak shaving. I don't know

I don't think the point is about avoiding value judgements, just setting scope of them. And yes, any judgement can quickly turn into yak shaving. I don't know that this is about mathematical precision, it always reads more like saying "put down the goddamn shears!"