I think your parent comment is alluding to the attempts by certain groups to massively expand the use/scope of the word "violence", e.g. the "speech as violence" idea.
My point was to find out where the poster believed to be the new demarcation line for physical violence that is acceptable (in parenting). I intended to suggest that leading by the arm might be considered violence by some, perhaps including myself.
I can certainly imagine scenarios where leading by the arm would be considered violence, as it can cause pain and has the potential to injure.
You hold a child's hand to guide it -- that's probably not violence.
HN needs a name for the falacy that people always seek to define precise exact rules for everything, ignoring the way that courts work by investigating the context of an action.