And are you going to bin Apple and Microsoft too? Not going to use USB? Not going to DNS? What hardware and software do you use that had no security flaws in the last year?
This is not the point. When you definitely can do something, you should do it. Other problems should not distract you from removing this particular software.
Uninstall flash, and refuse to reinstall it. And see if your nontechy friends and relatives will let you do the same to protect them as well.
There are a lot of sites that have multiple streaming options, but when flash is installed it's what they default to.