That is a great use case!
And screenshots on mac are, IMHO, hard to use.
The screenshot UI is frustrating, where to save to is under options, you cannot preview your screenshot, you cannot annotate the screenshot (something I do all the time on Windows), and having to choose between saving to file or clipboard is annoying.
I wanted to record video, which the Screenshot app can do! I know that because I googled for it, saw it could do it, and then spent a good 4-5 minutes trying to figure out HOW to do it before I realized the tiny grey scale circle overlaid on a couple of the toolbar icons meant "record".
(Red circles mean record, grey circles don't have much meaning, but hey, need to keep that UI minimal, can't let usability or actual meaning get in the way!)
The Windows Snipping Tool (RIP) is IMHO the best paradigm for doing screenshots.