This seems a rather difficult 'take away'.
If the control column does not provide the
needed response, stabilizer trim may be necessary.
However, excessive use of trim can aggravate the
condition, or may result in loss of control or in high
structural loads.
How do you deetrmine the limit before it becomes 'excessive' ? Couldn't an easier rule of thumb be devised ? A simple instruction to check trim seems a more natural starting point.