I don't see how I am missing the point. Everything you've said would be mostly within the guidelines. Where you would get into trouble is if you did start saying "Nixon really won" or otherwise trying to say the election was fraudulent, because that would be false. You may want to re-read the guidelines to double check this.

But you may want to be careful with statements like "We now know the 1960 Nixon vs. Kennedy election is suspect". The election is not suspect and the end results (Kennedy won) are not going to change. It was settled decades ago. Specific events like you mention might have been suspect, but the election itself was not, it was settled legally according to the way the system worked at the time.

>the election process is vulnerable to fraud and needs reform or oversight

But that's the thing though, just this saying this on social media in the context of any election is not meaningful and can cause harm, and is causing harm. Every election has statistical oddities, errors, disputes, recounts, and other issues. All of these mentioned election processes already do have oversight and formal reform procedures in place. That's all a normal and expected part of the process. It's a constant ongoing process to improve them. We can never make a perfect system so each election year we just do our best and then resolve the resulting legal disputes in the traditional manner. That's the way the system works.