There's a lot more than just Oak parquet flooring going on in that studio- I doubt many commercial studios were built without someone doing a fair amount of acoustical analysis and treatment, whether doing the full job in the beginning or handling the main things at the start and making improvements as time/money allow.
Also, the room in that photo is likely to be a control room, not the space where they do the actual recording of voices and instruments. Not saying it can't be the whole place, just that a room for mixing is usually very different from the room where they "get the sound".