iirc that just shows a toolbar with the different screenshot modes. You still need to manually select a mode, which is not as fast and intuitive as ShareX which combines most of the modes into one
Maybe I'm misunderstanding something. ShareX only requires you to memorize one keyboard shortcut, and then its a single click to either do a full screen capture, window capture, or region capture. For MacOS you either memorize multiple shortcuts, or you use one shortcut to show the toolbar, then you select a mode, and then you capture (well aside from full screen capture which is automatic). Overall it seems like MacOS requires either more memorization or more clicks.
Edit: here's a quick demo of ShareX for people who haven't used it [1]. You can see me enter capture mode (via keyboard shortcut), which starts in fullscreen capture mode, then I hover over the calculator to switch to window capture mode, then I move it away to switch back to fullscreen capture mode, then I click and drag to do a region capture and release to complete the capture. You can also see the annotation tools at top that can be used during capture.
That sounds like a lot of other third-party screen shot tools on Mac OS, too. The basic, built-in screen shot on Mac OS has a lot of features but it comes from a system-tool standpoint. It works efficiently for those with some experience, but it can be a little hard for new users to learn. The third-party tools add a more visual layer on top of that for beginners.
You don't need to memorize any shortcuts on macOS to take a screenshot. Just open up "Screenshot.app". It's in /Applications/Utilities/
That's a single entry point to all of the screenshot features as well.