Because "no evidence" isn't relevant. If it was, no one would care about Trumps taxes; and the IRS would happily decrease reporting requirements, and work on an honour system.
The mechanism by which the ruling powers of the nation are decided is pretty important, so the requirement on "time, money, and political capital" is not at un unreasonable - it isn't important if "we treated every problem like this.." because every problem is not equally as important.
The fact is there are huge incentives to cheat, and undeveloped nations across the world are characterised by unfair elections, it's not unreasonable, then, to place importance on the veracity of the election process, more than just a glib "there's no evidence that this is a serious problem".
> I care more about the process being abstractly and theoretically perfect than the people these rule changes would actually effect
fairness is dictated by the rules you dismiss as "abstract and theoretical". You talks about "facts" and what "we know", but that is the very issue - what we don't know. It's convenient to discount the value of what we don't know when the current worldview favours your opinion. I don't know anything about undetected fraud, and neither do you; neither of us know how much a problem this is, or who/how it affects people. The only solution is an airtight process, and you seem to dismiss that, worse still, attempting to characterise me as unsympathetic for placing value on such a thing.
The US is the richest country in the world, and it's government richer than most nations of the world. Why should it lack the resources to secure the most significant process in the nation, while poorer corporations (mastercard, veritas etc), and even the military can secure their own, lesser processes much better.
Yes, I dismiss your desire for an airtight process, because I think it's security theater, whose actual outcomes would be massive and largely detrimental relative to the actual desired outcomes.
Signing ballots with 4096-bit RSA? If you think that wouldn't prevent fraud, I disagree - dismiss without basis iyw.
(Ignoring RSA tangent, making all concert-goers go through an X-Ray to screen for weapons and drugs would catch more weapons and drugs than the current pat down/bag check process does. It would undeniably increase the security of the venue, while slowing down entry, exposing concertgoers to X-Rays, and IMO providing more annoyance than actual extra security)
It seems that you think, for voting, that's a fine trade-off. I do not.
edit: not disagreeing that signed tickets would prevent fraud. Disagreeing that it would be worth, say, an additional $5 fee on the tickets, plus slower more expensive readers to verify that they're signed correctly, plus plus plus etc etc. My entire argument here is based on the net utility of additional security measures, not whether or not those measures provide additional security.
The only thing you referred to that was process related (versus physical security) was use of encryption keys. Why not talk about the pros/cons of that?
> It seems that you think, for voting, that's a fine trade-off
With respect to x-ray screens? Not at all, nor did I say such a thing. Nor do I think all things that could be described as "security" are exactly equivalent to each other, such that you can mention x-ray scans, and the argument automatically extends to RSA keys.