Broken rocker arms two weekends in a row

The bearings and shafts all looked good, no discoloration or other defects/damage seen.

If the needles have worn ridges ( like a worn u-joint, limited motion back and forth created troughs) that the needles recess into, that the initial pressure to get the needle/rocker to move, could be twice the actual force needed to "rock" ? ?
With the extreme spring pressures .
Pic is extreme of my meaning .

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