Do empty apartments incentivize creativity and innovation? No, there is no reason to accommodate them, anyone who makes money by making life worse for others should expect society to take their stuff sooner or later.
Alright, and who is going to invest and build future apartments if there will be a high risk their properties will then be confiscated for "the greater good"?
It wont get confiscated if they just rent it out or sell it, it just prevents them from creating artificial scarcity by sitting on perfectly fine homes hoping prices will go up in the future.