People said this for Caw-Blade, yet tournament attendance plummeted and Wizard banned the most expensive Standard card ever.
B&R is a matter of balancing multiple considerations, chief among those diversity, according to WotC own website.
If that were WOTCs actual practice that they followed I would start questioning why a lot of cards are and are not on the restricted list right now.
But on the topic of attendance, over what time period and using what adjustments do we think WOTC is using to control for the Pandemic? I would actually wager that tourney attendance for Vintage is actually less impacted than most other formats simply because it has a higher percentage of diehards than other formats have.