It already is. What, exactly, is better than Windows at security features on desktop computers? Linux? There is nothing in there that comes even close to the defensive features of windows, like HVCI, a subsystem that checks for driver signatures and the likes isolated by virtualization mechanisms, which completely prevents tempering with the kernel. Linux's support for secure boot only exists to make it convenient to dual boot with windows, it doesn't do enough to prevent kernel level rootkits, it's a total placebo and it's even worse if you use a distro that doesn't have signed kernels, like Archlinux. If you're self signing on the same computer, how exactly are you stopping malware?
Since Vista, the OS also gained some serious resilience against crashes that I have never seen on other operating systems. For example, it is possible for your desktop session to survive a GPU driver crash. On linux this is a guaranteed freeze or kernel panic. This is, fortunately, a rare event, but the last times I've seen my computer freeze on linux, it was always because of the graphic stack.
openBSD's slogan for having few remotely exploitable exploits out of the box doesn't mention that it's because it has literally no features enabled out of the box.
macOS and iOS are the systems with the greatest amount of privilege escalation fails by far. In fact, what do people think jailbreaks are? Some of which are truly frightening when you think about what could have been. Multiple jailbreaks were made that could be run just by browsing a webpage on safari. This means they punched through the browser, punched through privilege escalation and had the potential to install a rootkit on your phone. Just by visiting. A. Webpage.
How many times such a thing has happened on Windows in the recent years? visiting a webpage installed a rootkit on your computer?