Part of me suspects that at least some of the WFH productivity boost companies see is attributed to home offices being quieter. My home "office" is on the attic

Part of me suspects that at least some of the WFH productivity boost companies see is attributed to home offices being quieter. My home "office" is on the attic landing, with no door, and I have a 3 year old running around the house. It's been quieter and easier to stay focused here compared to my company's open plan office. I went back to the office for the first time in over a year a few weeks ago and I was flabbergasted at how low my productivity was despite working hard the whole day.