Type 1 diabetics NEED to shoot Insulin. Others, meaning Type 2’s, not so much.
I’ve found is that best option is to have people hook up to a Continuous Glucose Monitor (CGM) and find out for themselves that eating the right foods (i.e., carb-free) will pretty much end the ‘need’ for Insulin. They need to figure it out themselves.
I think a CGM is the best thing since sliced bread and they should give it to folks a lot earlier.