Sorry, he may sincerely believe that, but, no. Raccoons can *bite through* chickenwire, in addition to just ripping it apart. So, no. Always gonna be riskier no matter how you slice it.
(Back in the day, there used to be higher-quality chickenwire out there, and that was apparently rather more predatorproof; but good luck finding any now, and in any case, good-quality welded wire mesh will always be safER.)
Good luck, have fun,
Pat