I always say that a person is the weakest link in the chain of security, which means that anyone who doesn't understand that the internet is a very dangerous place won't be much safer if they use some alternative OS. It is true that the largest percentage of viruses/malware is designed for Windows, but that is not the main problem - the real problem is that most users do not know how to act preventively to prevent infection of their device.
Anyone who has bad internet habits and doesn't have any antivirus/firewall will sooner or later step on a mine, regardless of which OS they use.
Prevention is the best and no Antivirus software or Internet Security software can keep your devices clean like your good habits with Internet and your device. Your habits and your activities on devices and Internet are best prevention you can do.
If a person has series of bad habits, it opens holes of hackers to exploit your devices, accounts and wallets, then stealing your money.
Windows is most favorite targeting OS from hackers because they can expose biggest possible victims on Windows OS, and they will target at biggest possible victim community first. It can maximize their successful rate and help them to steal more money than spending time to code something on smaller OS.
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