Users vote with their feet based on cost and UX. While intertia is certainly a thing, there's a reason Zoom got a foothold while others didn't. The ability to send out links and having people join the meeting without creating accounts or manually installing clients first is huge in most real-world scenarios. Could you do that with... Teams? Skype? Hangouts if they weren't gmail users? Do those people know anyone with the knowledge and gumption to host something?
From the beginning of my involvement in FOSS like 25 years ago, developers have griped about non-technical users being intimidated, or even just really annoyed by UX resistance that we consider trivial. That's the primary reasons open source alternatives are alternatives rather than the standard in user-facing software.
this is how it used to be, until HTTPS and cloudflare-like hosting solutions, were guzzled back like electric kool-aid. all you really needed was an IP and perhaps a port number if endpoint was behind NAT.
I never really understood why people like Zoom's UX, I find it unintuitive and awkward.
Even worse, it tends to go hand-in-hand with astonishing overconfidence in their understanding of other fields. I've had two other primary careers-- designer, and chef-- and I can't count how many developers have "explained" parts of those fields to me despite knowing I'm a subject matter expert. Like their astonishing intellect and that related Metafilter thread they skimmed makes them authoritative. I get supernova-intensity cringe when I hear other developers shoot off Dunning-Kruger-esque oversimplifications of other fields' genuinely hard problems.
When I hear developers talk about the arrogance of designers, I can't help but laugh... then maybe cry. Many seem genuinely aggrieved that interface designers have more input on the interface design than they do.