I expect the number of the new security vulnerabilities to be a lot more than the bugs visible to the users. Considering the MacOS track of record in the last y

I expect the number of the new security vulnerabilities to be a lot more than the bugs visible to the users. Considering the MacOS track of record in the last year ( https://support.apple.com/en-us/HT201222 https://support.apple.com/en-us/HT201222 ), I am pretty worried. When I see a weird behavior I always wonder if it is a Apple's bug or a bug introduced by something trying to exploit a vulnerability.