"what persuaded you can be used to persuade others"
What really persuaded me was decades on health committees and an aptitude for math. I'm not sure that's persuadable material.
My intro was actually a shock. In the mid-to-late 80s, I was on a nationwide conference call for Actor's Equity as my city's representative. We got the jaw-dropping news our requirements to qualify for health care were going to double, overnight. Stunned, several asked why, one asking "Is this about this...AIDS thing?" To which the insurance guy on the phone hesitantly said, "Well...um...yes, this is about this...this...new cancer.
IOW, the insurance company wasn't even calling it AIDS yet.
My first reaction was, "This affects a lot of my constituents; I should get involved." I served on health committees the next two decades, and was elected a health plan trustee in 2011. I've been for single payer since I understood the concept.
Serving on the committees gave me a lot of research on how others administered plans, and to our favor, we weren't afraid to steal good ideas. "Wellness" was a new thing back then (early 90s), but we believed if we enacted it, we'd see a bending of the cost curve away from its freaky trajectory after a handful of years.
We were wrong; we started to see it almost immediately, from the first 6-month report, to every one after that. The insurance companies didn't balk at all. They knew what we were finding out: prevention is MUCH cheaper than cure. Which is why insurance companies didn't make a peep when the ACA mandated "free" wellness: they knew it meant even MORE money in their pockets.
When asked over the years why I favored single-payer, I developed a saying: "Look up Health Insurance Industry Reports Record Profits and ANY YEAR YOU WANT".