I mean yeah you can still eat the bananas, and it’s not necessarily a bad thing to have them under ripened as you do end up with a different range of nutrients. I just don’t think as general practice, most people are going to get the best experience if they refrigerate them. Maybe it’s just a bananas I get in my region but I’ve never been able to successfully refrigerate a banana and have it be as good as just left out to ripen naturally