> discussions have been going for ages concerning where the limit should be

I don't remember any discussions about that. It's always a statement 'to protect the children' or 'fight piracy'.

> It's always a statement 'to protect the children' or 'fight piracy'

Both of which make a lot of sense.

And the contrarian view is always expressed as a matter of "privacy", as if remote privacy had ever existed before a couple decades ago.

Laws must be discussed based on their intentions and their expected result. Inventing dogmas doesn't help societal advancement.