That I have proven, that there is no system is perfect or malware proof.
You are right.
Except the only malware that will ever affect OS X is stuff you install yourself. Anti-virus software won't save you from yourself. It can only pick up the pieces once YOU have done the damage.
Be intelligent enough not to install every little thing that comes your way and you will never need it for any reason ever.
Another personal anecdote that you will ignore: In the nearly twenty years I've used the "modern" Internet, not once have I ever downloaded anything, nor has anything shown up on my computer having auto-downloaded, that I didn't recognize as safe.
This. Stuff. Just. Doesn't. Exist out there. I don't know what dank corner of the Internet you'd have to visit to even FIND this stuff, but you can go just about anywhere and never even SEE anything REMOTELY close to malware for OS X.