Most of my time isn't spent slicing and dicing snippets or juggling windows. Rather it's thinking, planning, a bit of experimentation, reading, repeat.
And powerful, built-in auto complete with visual IDEs like IntelliJ or PyCharm make them hard to give up.
I just don't devote much time to mastering text editors. In fact I've had to change editors so often that mastery may have been unrealistic anyway.
I'm not sure everybody would like a development environment as I describe it, that's why I invite people to try Vim for example for a couple of week (I've some free articles on my blog about that) or i3, and see what they think about it. Exploring new possibilities is never bad.
About learning the tools: I agree, but you can learn much more from some tools than others. I think of Vim as easy to learn, hard to master because there is so many stuff you can do with it. But I used Intellij IDEs as well for a long time, and I don't think it's hard to master, because there's not so much you can master, except maybe the keyboard shortcuts.
Like other endeavors of growth, a good approach is to regularly make a small effort to learn a little more about something (like your tools, which includes keyboard shortcuts).
As one simple example, if you have a URL somewhere and you want to quickly open it in a new window, you just use the keyboard shortcuts to copy (which hopefully everyone knows), switch to browser (alt-tab or cmd-tab or even [cmd-space fire return]), ctrl-t or cmd-t to open a new tab, paste, return). This sequence becomes so hard-wired that you can go from seeing a URL to reading it in a new tab in a couple of seconds. And since it is hard-wired, your train of thought is not interrupted with common small thoughts like, "hmm where is my mouse pointer? wiggle mouse - ahh there"
But like I also suggested, with left hand on the keyboard and right hand on the mouse, and knowing a few very common shortcuts, you can be very fast at getting things done.
In both cases, knowing keyboard shortcuts is... key.
Lastly, there are some awesome tools like Keyboard Maestro or possibly Hammerspoon (I use the former, but have heard the latter is decent). With a bit of effort, you can make some really useful macros and do a lot. Heck, even just using Automator can do wonders. For example, it's pretty easy to make a file right click action that will resize and export an image into one suitable for web publishing.
The summary of all this really is that learning your tools makes you much more effective and performant. Seems obvious, but it's easy to forget.