I thought about this some, and don't agree that this is whataboutism, because there's no change of topic. The environmental impact of WeWork's business decisions is supposed to be the topic. But the impact of massive transatlantic air travel gets a pass, and the far lesser impact of meat-eating doesn't. I think it's legitimate to ask whether someone's being consistent or sincere in their commitment to Cause X when they're decrying Thing X while (somewhat uniquely!) performing a Thing Y that does much more to hurt Cause X than Thing X does, you know?
But aren't nearly all individual actions to combat climate change or improve animal welfare like this? I think it's not hypocritical to take first steps that are easy, it's just tactics.