I agree that the gatekeeping isn’t a good thing, but you should learn at least the basics of the CLI. It will give you a better understanding of what’s going on behind your GUI and makes troubleshooting and fixing problems a lot easier.
Definitely not required but it is absolutely a skill worth having.
It’s absolutely not a skill worth having. If you ever run into issues and need the CLI, you can always get your knowledge right in that moment. If you already can do everything with your GUI and get the same results, getting the knowledge to do it some other way is just wasted time and duplicate work.