It seems deliberately confusing to me since there is no fundamental difference between voting now and voting on the day of the deadline, but the way it’s discussed and referred to seems to imply that the correct day to vote would be waiting until the last minute instead of voting just getting it out of the way weeks ahead of time.
Historically, all regular voting was done in-person on election day and mail-in ballots were a special exception (e.g., for people with disabilities). It’s only in the last few election cycles that voting by mail became the norm, and most people still use the pre-existing terminology.
Upvoted for correct, accurate, and complete information. I really don’t have much to add, other than to say good work!