I currently have three copies of the wreath and cake — it really doesn’t take that long if they want more. A few minutes more at most.
As a housing enthusiast that amount is nowhere near enough. You can easily use several in a build. Take for example last years snowman, that was used as a modern light and could easily use 6-10 in one build. Multiply that by multiple builds and the fact that these are untradable and only available during the event (no way I’m paying $5 for one) and you might understand why someone would want to farm dozens of them while we can.