Sometimes, first impression is not the last impression. It happens that you go to a business say a restaurant & don’t receive the type of service you expected so you leave a negative review, but upon second visit, their service matches your expectation & you want to update the review but are too lazy to do it manually.
To help you with that, Google now allows you to edit your reviews directly from the local knowledge panel. Here’s a screenshot of the same:
But the question is, will it lead to more review edits? To be honest, it’s very unlikely. Because the percentage of people who actually bother to update reviews is way too less.