I still say it's a lack of options that makes them more "open"
For people over 45 I get they grew up when it was far less accepted and lived in areas where there were few black people or it was very segregated. If you are a kid of the internet age it really boils down to options
Interesting responses here, as someone who grew up in overwhelmingly White areas (New Hampshire and Arizona), I have always dated IR, from my first girlfriend to my wife. I have had a handful of women reach out to me over the years and express regret that when we were younger (high school, college, ect.) and they were clearly interested in me, they could not bring themselves to stand up to pressure from parents/ friends ect.
While I hope I have been gracious in accepting their regret, there is a part of me that feels a twinge of irritation that they are now reaching out in hope to rekindle something when there is no/much less risk to them.
What pressure?