There are various estimates from various sources but sure, let me find at least one source for you. The estimates are as high as 2.5 million times a year that a firearm is used to protect someone while others are more around 600,000. Now it is a problematic statistic since many times a gun being used to prevent a crime is not reported and other times it is hard to determine exactly what role the gun had but generally speaking the numbers are quite good in favor of guns protecting people. 

This one has a lot of numbers and it references sources at the bottom. 
https://www.gunowners.org/sk0802htm.htm

But for the sake of argument, lets say that the rate was much lower, lets say 10,000 times a year where a firearm was used to protect someone. Why do you want to take away the ability of those people to defend themselves? Consider that we aren't just talking about protection from people but animals as well. There was a bear outside our tent a few weeks ago on vacation. Luckily it ran off.