Yeah, most organizations need to expose something to the internet as a matter of normal operations -- at least some sort of a web app if not dozens. It would be great if we could all just have udp 56820 listening silently for a key, but that isn't reasonable for most organizations that have normal users expecting normal applications.

Yes, everyone is rushing to implement zero-trust principles for real now. It's getting harder to trust that your public facing endpoints don't have vulnerabilities, and it's getting harder to trust that your internal software and endpoints haven't been compromised from within your pre-existing trust boundaries. A lot of the increased workload is due to patching up the existing security infrastructure, and on top of that, building out new solutions to better fit today's threat landscape.