The government conducting a census is mandated by the cons ution though; the cons ution includes the right to vote but it doesn't create a duty for the government to seek out everyone's vote.
I don't necessarily have an "issue" with mailing everyone a ballot, but I sympathize with people who do, and I'm fine with curtailing mail-in voting (as long as it's replaced with mandatory in person early voting) if it restores confidence in elections.