I love all these elements in a story. You generally know the villain(ess) is going to get their comeuppance. It's a bit like Columbo - the detail is in finding out how that comeuppance will happen. You also know the undertrodden hero(ine) will also prevail when so much is against them. I do love to root for a decent hero(ine) and fairytales never let me down in that respect.
Fairytales follow a simple but highly effective structure.
Usually the Rule of Three. Repetition works. I like a good narrative link and you know what you're getting with a fairytale. Problem and heroine portrayed. Heroine overcomes problem. You know there will a happy ever after ending (or at least a happy for now one) and given the state of the "real" world fairytales can be perfect escapism.
Fairytales are usually amongst the first pieces of literature anyone is introduced to in their "story career".
So I think it wonderful to keep those fairytales going and to add to the canon some of my own, in the hope someday someone else will love those too.