Usually bribers will want some proof, like a photo of your vote, when you go inside and there are election observers and you're not allowed to use your phone it's more difficult to provide that proof.
a) you get bribed by some external sweepstakes or ad or any which way to vote for a candidate you genuinely don't support.
b) you in your home get hit by a vandal with a specific mission to make you vote for their candidate. Remember, this felon does not know when you get your ballot nor when you voted.
Hell, which is more likely to be tracked down? The Musk trials will take months. that felon will be arrested before the week ends.
a) bribing is more probable, happened by foreign country here this Sunday
b) it's a lot more dangerous for the entire society, it's not a vandal in your home, if anonymity is not implemented by voting process, then the local gang leader will force you (and all your neighbors) to vote for him, at the date he will tell you and you won't be able to do anything as he will be in power after these elections and will make possible to fake future elections.
