This has been the exact opposite of my experience.
There is an endless availability of engineers who can push JSON to an API, but people who can lead a team, handle cross team comms, architect, and code the hard problems are fairly rare. This is why they command salaries comparable to specialist doctors.
Meanwhile, MBAs are an endless resource, given that that and Law School are the default for people who haven't figured out what they want to do in undergrad.
The thing is though, most of the time you really do just need to push JSON to API. Your average non-tech company doesn't need hardcore grizzled IC veteran who can code hard problems and architect. They would rather just hire a good manager, an architect, and some mid level people to muddle through. Hyperscale is not a widespread need outside of FAANG.
A competent manager of a software team or org should also be able to do all the things you mention for ICs minus the coding part while also inspiring, leading, people managing. Hiring an MBA to lead/manage a software product group and engineers without those capabilities is asking for sub par results.
There is an endless availability of engineers who can push JSON to an API, but people who can lead a team, handle cross team comms, architect, and code the hard problems are fairly rare. This is why they command salaries comparable to specialist doctors.
Meanwhile, MBAs are an endless resource, given that that and Law School are the default for people who haven't figured out what they want to do in undergrad.