The person you're replying to is wishfully handwaving away electronic attacks like we haven't been facing an endless cascading catastrophe of device security breaches since practically forever.
They further keep equating property theft scenarios, where you would easily notice that your money went to someone else, or personal harrassment scenarios, where your first consequence is a human individual audit not a national election outcome, with scenarios where you'd have no idea that your vote was changed unless you start implementing policies that would allow people to sell their votes, which is something that we don't allow for a reason. Paper ballots kept in small batches distributed among thousands of precincts that are counted by hand with opposition observers are hard to systematically rig. Bits in a cloud machine somewhere that lose all connection to your action are not.
They further handwave away the significance of stealing an election because catastrophic harm would only happen _sometimes_.