Ok, any evidence to suggest it will save any lives? The study you posted doesn't even suggest it. Or are you just...
how would I get evidence about something that can only happen in the future?
Still, if the study finds that ~ 45k die each year due to lack of health insurance then it doesn't take a leap of faith to figure out that if that group of 45k had health insurance then some of those deaths (in that year) could most likely have been prevented.
Let's change "health insurance" to "food"
If 45k starved to death each year due to lack of food would you still ask me to prove that giving them food would prevent them from dying from starvation?