"Can't imagine why anyone would wait years to complain"
Oh, you noticed that, did you? Suddenly we get a critical mass of indignation two weeks before an election. After decades of silence, not to mention a complete lack of criminal or civil charges against Arnold, or anything else.
This was a raw political attack, ginned up by the L. A. Times which painstakingly sought out everyone who had ever worked on sets with Arnold, and carefully timed and coordinated with the Democratic Party.
Unfortunately for the Democrats, it was so blatant that very few people bought it, including women voters.