In the case of elections, it's because one party has decided that making it as easy to vote as possible helps them win elections and so insists that election fr

In the case of elections, it's because one party has decided that making it as easy to vote as possible helps them win elections and so insists that election fraud does not exist and any protective measures are an attack on democracy itself. And they have the support of most of the media and organisations like the ACLU, so those claims are part of the mainstream beliefs in the USA and other countries' experiences with stuff like vote-by-mail fraud are ignored. At least, that's the kindest explanation I can give, given that one of their former congressmen just got caught rigging a bunch of elections... You may have noticed that between 2016 and 2020 there were a bunch of media articles about voting security and how poor it was despite this. That's because the US media has no problem concluding that the voting system can't be trusted when the wrong party wins something important, like the presidential election. I'm not even exaggerating here, whether (say) voting machine security is portrayed as a non-issue that's impossible to exploit or a gaping hole that throws into question the entire results aligns exactly with who's winning.