> It’s a guideline ... Pick a number
It's using a parameter of secondary importance as a primary, so it's wrong with any number. The comment even has a helpful analogy to LOCs. People need to stop freaking out over reasonable, well-intentioned criticism of guidelines as if they were arguing something else like misundertstanding of that strictness of rules.
Until we have an absolute metric to use for measuring comprehensibility, composability, and number of high-level concepts addressed by some unit of code, highly-correlated secondary metrics will have to suffice.