It's also not as easy to hack electronic systems anymore. It's not that they are invulnerable, but the vulnerabilities are generally more complicated and difficult to exploit. Setting aside people still running Windows XP or something, vulnerabilities get patched pretty quickly today. State actors have the time and resources to still do straight up electronic hacking, but opportunities for individuals are sparse.
Of course there is still the human element. Most data breaches done by individuals nowadays rely, at least in part, on social engineering.
What exactly are you basing this on? Harris ran a terrible campaign with the usual Democratic half-measure policy proposals and lost. That should hardly be a surprise. There is no evidence to say that a populist Democrat like Bernie or AOC couldn't win.
What if Harris had made the whole campaign into a referendum on the broken healthcare system? It turns out that that's where the Republican voters she was trying to woo were hiding all along.