Nobody never said they would be. However, their market share is notably smaller (and the operating systems they run on is vastly more diverse), and thus there's

Nobody never said they would be. However, their market share is notably smaller (and the operating systems they run on is vastly more diverse), and thus there's little sense in writing bulk malware targeting them. Targeted attacks definitely, though in that situation one would be screwed almost certainly anyway if the adversary is capable enough.