So you subscribe to the narrative/they intentionally led people up the garden path then.
Billions spent every year and they couldn't decide (or publicly admit) whether masks were effective in a pandemic or whether pubs were any worse or better than an indoor arena.
[Edit] It also wasnt indoor vs outdoor, it was small crowds (pubs) vs large crowds (indoor arenas).
No, I don't think they were leading people up the garden path. I think at the time, a few things were believed. 1) There was a huge shortage in clinical-grade masks in hospitals and other care settings. 2) It was far from clear how effective masks were outside of those clinical settings. 3) The fabric DIY masks that were being fashioned in countries that did adopt default mask wearing were even more uncertain in terms of their efficacy.
Those three things combined to prompt the WHO and others to recommend masks not be worn in the early months of the pandemic. Now, not only has the global supply chain adapted such that the supply of masks is not such an issue, but there is also more science to suggest that covid might operate slightly differently to other airborn viruses, and therefore masks might be more useful, hence the advice has changed.