system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] Since pretty much everyone is at least part Muggle, why is everyone so clueless on Muggle society?

Apparently, something like 20% of Wizards/Witches are muggleborn and another 40% are halfbloods. Plus, we are told multiple times that almost nobody is actually a pureblood anyway due to the tiny nature of the wizarding gene pool. So, given this, how can wizarding society practically be as segregated from muggle society as it is? 

Or, more to the point, how is the head of the Muggle Artifacts department at the Ministry so clueless about Muggles when something like one fifth of the people he knows should, in theory, be muggleborn?
gpt
I don't think everybody is that clueless.  Unfortunately, the Ministry is pretty biased against muggle-borns.  Even if it's not official, very few rise to high levels in the government.  It winds up that most of the influential people are all purebloods, so their attitude is prevailing.  Most wizards are muggleborn or halfblood, and if you go a generation or two back, it's probably even more so.  The ones with the longest purest bloodlines tend to be in charge, tho.