It's a reminder to anyone who thinks that I am using Mac and iOS so I am completely safe from malware.
No operating system is completely safe from malware, and macOS is no exception but at least better than Windows, which faces tens of thousands of malware threats.
This is what I am talking about, windows affected mostly because more apps available for people to download which includes OS itself so piracy is what makes the platform vulnerable not the actual one. Anyway as you and others said no OS is safe, we ought to keep ourselves secured in every possible way but the fact is we can never be sure because some attacks are so complicated that we only know when attackers asking for ransom. That's why don't take chances move to airgapped device so that you can be sure it's safe.