Yeah, but part of the trolley problem is that it's not just about choosing the option with the least harm, but also how being active in the decision impacts the morality of the situation. Being of the opinion that letting 3 people die on one track without your intervention is better than actively choosing the death of 2 is a completely valid response to the trolley problem. You don't have to agree that it's the right decision, but it's still valid.
Applying that to the election would mean deciding that letting the bigger harm that would be a Trump presidency happen is preferable to being an active participant in helping steer the metaphorical tram onto the Harris track and harming the people there.
There are no black and white answers here. That's the whole point of the trolley problem. Everyone is going to have their own point of view and it's going to vary depending on how they perceive the harm on each track. Like I said, if I had a vote in the US election, I'd probably vote to send the tram onto the Harris track, but my willingness to do so wouldn't be infinite, just because the Trump track is worse. At some point the harm becomes so big, that I would refuse to be an active participant, even if inaction meant an even worse outcome. Some people (understandably) feel like that with the current choices. That doesn't make them Trump supporters or bad people.
It seems like it's still possible to disable Gatekeeper on macOS 15: https://discussions.apple.com/thread/255759797
I haven't tried it though. It's so rare that I want to run something unsigned, I prefer leaving it enabled and then allowing whatever it is I want to run.