You know how it's funny listening in to private pilots having a discussion about how they'd take control and save the day if the flight crew somehow became incapacitated and was unable to perform their duties? It's kind of the same thing listening to airline pilots talk about what business travel is like when they've never worked in an industry that does so on a regular basis.
Aside from Zoom and other teleconferencing really only being useful to maintain existing relationships vice building new ones as rickair pointed out, traveling for meetings is a subset of what business travel accounts for. Aside from the "meeting" that is discussed here, I've done business travel in a previous life to :
1) Build a new team
2) Search for/inspect new property
3) Purchase a high dollar piece of equipment
4) Install a new system at a customer site
5) Troubleshoot a system after doing so remotely proved unworkable
...and I'm aware of others who have done all that (and more) without attending the typical "meeting" that is talked about here.
On top of that, work-from-home isn't the panacea that it's made out to be and the business world is just figuring that out:
Wall Street Journal Article
No doubt business travel will be slow to return, and it will look different when it does, but it will return. The notion that teleconferencing can and will replace it is just pants-on-the-head crazy.