Somehow Windows has always been and is still crap at managing archives. Ultra-slow, has trouble opening or extracting individual files inside the archive, etc.
However, 7-zip has been doing all that perfectly forever now. Not sure why anyone would use WinRAR, paid for or not.
Even 7Zip now though is insecure and outdated. Use NanaZip if you’re on windows, it's a fork that is more secure and uses modern compression/encryption algorithms in addition to integrating better with current Windows APIs
WinRAR is an internet institution at this point. It’s like Amtrak, why would anyone ride the train when there are better cheaper and faster modes of transport? Don’t know but people do anyway