My own best guess is that . . .
The RM
—considers the source, laughs &/or shakes head and goes on . . .
&/or
—sees it as an inconsequential ignorance about his true self, priorities etc. laughs &/or shakes head and goes on . . .
&/or
—figures the children have to vent now and then regardless how askew from reality—laughs &/or shakes head and goes on . . .
&/or
—recognizes some truth in the assertions, learns something of value and goes on without making an awkward fuss about it . . .
and/or
—considers the ignorance involved on our side too significant to bother with compared to the meager worth of the issue—laughs &/or shakes head and goes on . . .
and/or
—is too busy and/or tired to bother regardless of the merit of the issue and goes on . . .
and/or
—extends grace regardless because he wants grace extended to him regardless and goes on . . .
and/or ???
Moderators have extremely thick skin. It’s a necessary qualification to do the job.