The trouble is we are all now only too familiar with pedophiles and people who go beyond normal kinky spanko stuff to enjoy the inflicting of non-consensual pain on the weaker and vulnerable, and in the past, not a few of these people found their way into the teaching profession. If we ever reintroduce school CP we will need far more rigid accountability and guidelines than ever existed when us oldies were at school, and I suspect that teachers are far less keen to have this responsibility than the general population would be to foist it on them
That society has gone soft, so much so that collectively it can’t cope with a few inches of snow without wholesale ceasing of public transport, closure of schools and workplaces, and chaos on the roads. In that society everyone, adults and children alike, has rights, but no responsibilities.