No I think we're really missing each other somehow... Board members don't usually work at the company. They don't have Workplace accounts, or departments. The headline that this 'asserts control' is click-bait.
In Facebook's case, Zuck already has control of the company but "asserts control" through strategic moves at the board level by "firing" Hastings and Bowles (who both disagreed with his fumbling on political ads). Outside the company he "asserts control" thanks to his increased acrimony towards regulators while appeasing the Trump circle.
A board member who goes after Zuckerberg not only risks getting fired from the board but also getting heat from the White House. This is a very unusual situation for a company in a democracy and in the tech sector.