@mcmcgreevy Counterargument-- it's legitimate to ask such questions when the technology has a sufficiently high failure rate, and Zoom is above that.
It's similar to how microphones and PA systems have existed for decades and yet many people who've been burned by bad setups have learned to start with inconsequential banter as a way of ensuring the audio stack works.
@mcmcgreevy This speaks a lot to how different our contexts of use are. The overwhelming majority of my meetings where screen sharing occurs are not prepared presentations.
That said, even with prior preparation, I've seen Zoom screen sharing be a bit of a crap shoot, so each individual click of "share screen" is a new chance for failure. Heck; for months on Zoom, thanks to some bug or another, sharing a window would cause me to lose other windows, sometimes the Zoom window itself.