I am not a gigantic supporter of artificial flowers. But sometimes, just sometimes, when you make a party favor you need a blossom or a bloom to go somewhere awkward or it would be far kinder to use something that will not expire from dehydration or heat. That is when I would use a paper flower.
In my own defence- I make these flowers myself.
Artificial flowers work best if you don’t even pretend they are real. Incorporate something unmistakably whimsical in the basis of the flower design, such as the spiral stems of the roses.