The Society simply didn't need to build all these new premises. It is simply morphing into a real estate building and flipping organisation to generate funds.
With some irony , part of the UK Bethel sold a couple of years ago has been repurposed as (you guessed it) a major film studio. Clearly something the Society could easily , and at a much cheaper cost , have done themselves , had they genuinely required extra filming capacity - but for obvious reasons they simply chose to sell up and new build elsewhere.
https://www.cityam.com/converted-london-jehovahs-witnesses-hq-to-start-new-life-as-film-studio/