The diversity of Linux distributions is one of its strengths, but it can also be challenging for app and game development. Where do we need more standards? For example, package management, graphics APIs, or other aspects of the ecosystem? Would such increased standards encourage broader adoption of the Linux ecosystem by developers?
TL;DR - Because people are stupid.
One of my coworkers (older guy) tends to click on things without thinking. He’s been through multiple cyber security training courses, and has even been written up for opening multiple obvious phishing emails.
People like that are why company-owned laptops are locked down with group policy and other security measures.