I'd venture to say that a lot of people who are fine with reviewing before a day 1 patch would change their mind if it were to turn out that the day 1 patch introduces game-breaking bugs or horrible microtransactions.
If reviewers shouldn't have to wait for a day 1 patch that improves the game for 99% of their audience, then it's no big deal for them to pump out a review that doesn't take into account a day 1 patch that might ruin the game for that same audience.
If reviewers shouldn't have to wait for a day 1 patch that improves the game for 99% of their audience, then it's no big deal for them to pump out a review that doesn't take into account a day 1 patch that might ruin the game for that same audience.