*In normal times introverts have to adapt to extrovert preferences. Open plan offices for example.
It's temporary flipped during the pandemic as introverts are more likely to be less affected by the loss of social interraction of lockdown and restricitons.*
This is exactly it, and what posters have meant when they have said the world is "built for extroverts". It's so ingrained as normal, we don't question it. Working in open plan offices, endless meetings, training events that consist of icebreakers and a lot of conversation where interaction is expected, and networking events. This is the norm for a lot of people who work in office based industries, but for introverts, this constant level of interaction is exhausting and outside of their comfort zone. It's what PPs have meant when comparing it to racism; when you have the privilege, you don't even notice it and just accept it as normal.
With covid, this has effectively stopped and the way we work has completely changed. Extroverts never paid much attention to the way things were before, because for them, that level of interaction was comfortable. Now that has been removed, extroverts are suffering somewhat.
The sensible thing to do would be to realise that both Is and Es have something to offer the workplace, but in different ways, and to incorporate both of the above work scenarios into our cultures and let people play to their strengths.