I generally agree, but it also does feel like just an extension of dogfooding. If you work for a company that has a product that solves a certain business need, it generally makes sense that you wouldn't hire a different company to solve that need.
Obviously in this case the reasonable response is that Teams and WebEx are worse products and MS and Cisco haven't shown much inclination to fixing that, but that's more the fault of the company's bad products more than anything about the internals.
I feel like this is a good argument to not allow mega mergers and consolidations. Github/LinkedIn etc could have both been operating as Public companies and not have to deal with this BS.
Obviously in this case the reasonable response is that Teams and WebEx are worse products and MS and Cisco haven't shown much inclination to fixing that, but that's more the fault of the company's bad products more than anything about the internals.