A little thought experiment.
Remove the reverser buckets, attached chains to the rear engine nacelle, and stand in the exhaust flow holding the chains. You are now the reverser plate/bucket.
(yeah, yeah, assume a heat-proof suit!)
Run the engine up - will there be a substantial force pushing you backwards, and straining both your arms and the linkage chains? And by way of the chains, pulling backwards on the nacelle?
Y or N?