A very important point this misses:

Insulin resistance has been shown to cause weight gain. It's probable that a lot of cases of type 2 diabetes are a vicious cycle where the initial IR, caused by some other factor, causes weight gain, which then worsens the IR...

My mother died of complications of type 2 diabetes and the initial cause was probably undiagnosed gestational diabetes. I suspect this because gestational diabetes causes excessive birth weight, and I definitely had excessive birth weight (which nearly caused both of our deaths because the doctor didn't do an emergency c-section when he clearly should have).

This then caused weight gain (as in, she never lost her "baby weight," which might have been exacerbated by the fact that she wasn't able to breastfeed me because I spent a stint in the ICU and that was before they understood to have women pump, so she lost her milk). Which then...she tried every diet under the sun, she tried everything to get her weight under control, and she couldn't...and I know people saw it as "She deserves it because she's fat."

It was a pregnancy complication that was never identified or treated and thus became a long-term chronic illness.

Type 2 is so much more complicated than "You're sick because you let yourself get fat."