@Buck Thank you so much for sharing! 8) Please know it truly does give me a glimpse into “how you roll” in the world. Seems that your colleague “lives that life.”
Please know that I used those two colloquialism intentionally. And following is my motive…
In the African American community/culture, particularly the urban community, there are expressions that we use when we discern that there is a shared life experience/understanding/knowledge. Expressions like “that how I roll”, "live that life, or “that’s how I get down”
Here’s a question?
What did people do before blood glucose meters were invented and what world view did people who "blind bolused have? How did they “get down,”, “how did they roll.”
When I read your thoughts pertaining to the internal “frame of reference between an insulin user who blind boluses and [yourself],” I got really excited.
I got excited because as a certified health coach expressions like “one’s internal frame of reference” help us help people who decide to use a health coach/diabetes educator/health educator for a variety of reasons.
Now, I don’t know you nor your colleague, but here is what I strongly believe I can say (from an urban girl’s perspective)…
You not about “that life” (blind blousing) and
your colleague
She “gets down like that.” “That’s how she rolls”
Is it right or wrong…
Not my place to say. I don’t look at people from the perspective that they are broken.
Do I believe you both have a shared understanding of “blind blousing?” Yep!
And by extension can one infer that before the invention of the blood glucose meter, people who had family members who were type 1 had a shared a similar experience as they move, live and existed in the world? I would say, Yep!
Is it a culture? I don’t know.
Thank you so much for sharing with me. Please know that you are instrumental to my growth. I thank you for starting my day off in such a great way!! 
And I wish you a great one as well.