I have no connection to and don't know Wikimedia Foundation, and the context for these references is not totally clear. (Maybe it was related to these
https://meta.wikimedia.org/wiki/Wikipedia_20/Events.)
Regardless, do you really begrudge the CEO visiting these places?
I get where you're coming from: it's easy to roll your eyes and dismiss this kind of thing as political correctness, pointless "diversity and inclusion" work, pandering to liberal friends etc.
But step back: Wikipedia aims to be the world's encyclopedia. I'm as much in awe as anyone of what a fairly narrow group of pretty obsessive contributors has been able to achieve (I just checked: I've made five tiny edits in 15 years, so not me). But Wikipedia will never succeed in its aim unless it has active contributors in places like Accra, Berlin and Chandigarh.
I honestly don't remember what the donation banners have said in past years. Did they imply they were funding servers and bandwidth only? Maybe they did. But if you actually believe in the mission of Wikipedia, you have to consider that servers and bandwidth will not be enough and that community—maybe including the odd party—is a core part of it.
In that respect, I'm not sure it's too helpful to lump it with Mozilla.