Flex so right now the variants are the result of the non vaccinated people having the virus and it mutates?
Yes, but mutations generally don't occur in healthy individuals. They occur in immunocompromised individuals. So if you're healthy and someone tells you to get vaccinated to stop variants feel free to punch them in their mouth.
"Where is the 10% number coming from, clinical studies?" It's based on both clinical and real world. The 3 main vaccines being used in the west are on average roughly 90% effective. That's where the 10% figure comes from. Again the 10% are mostly immunocompromised individuals.