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 the polls don’t open until the 5th, and as far as I’m aware, the votes aren’t counted until then even if they are submitted early.
When it was first added, early voting was not meant to be the way most people voted- it was meant to accommodate people who for one reason or another couldn’t make it to the polls that day.
It’s become increasingly more common as more people find out about it.