THat method of voting is convenient. IT is also rife for fraud. Anybody who wants to steal an election just needs to watch for homes where families are on vacation, or have moved but haven’t sold yet. They collect the mail for the couple of days that they know the ballots are being mailed. Then they can forge everything.
With apathy so high, it is likely the people they hit will never vote, or notice (more than 2/3rd of people who could vote often fail to in elections).
Down here, that could be the tens of thousands. MANY empty condos of snowbirds that typically are rented out of season, but aren’t from the economy.
The county I live in went to vote by mail because it was cheaper than operating polling places.
From what I’ve read of other states, fraud can be just as easily accomplished whether voting by mail or at polling places. Integrity is what counts.
In the Seattle City area, election fraud is known. That county always waits until all other counties have counted ballots before finalizing their count. Dogs and dead people regularly vote in Seattle.