That is a factor of course but there are far far more armed citizens then there are military and police forces.
At least 20 to 1.
There are a million variables and all you can really do is educate yourself and try to prepare to make the best decisions you can when stuff happens.
The military and police don’t need to control the armed citizens. They just need to control utilities, gas, food distribution. Citizens, including armed citizens, who want those things will do what the military says. The number of citizens who don’t want those things is inconsequential.