Hello everyboby! I have a question about computer operating system,that is: Is it necessary for a scientist to master Linux OS?

I mean physicist and astronomer, I’ve heard that physicists and astronomers usually use Linux/UNIX, not Microsoft Windows. Is it true? Lots of people say that Linux/UNIX is very difficult to use, I’ve tried Ubuntu Linux and found it’s really hard to use.
Thank you!

Now,I'm using RedHat Linux 9 as my personal computer operating system.But I don't know how to uninstall programs or applications,I cannot find file with name,for example,"Uninstall".Especially,to delete applications with resources codes.