Tongue in cheek again. As we are all well aware, these statistical tables can be manipulated, or accidentally distorted, according to the info which is fed in.
As you observe and state, often, virus infections are often caused by the use, (or misuse), of the operator. possibly, for the individual user, it would make no difference should the Os be Linux or windows.
IMHO, however, the majority of hackers are mischief makers, with no direct malicious intent. They are often drawn in by the challenge. When software giants constantly boast of their so-called security, the gauntlet is thrown.
I do wonder, with that in mind, if an open source product is sufficient incentive to inspire those hackers.