How do you rate a good teacher with a bad one? Education is a bit different than most professions. Testing kids solves for the wrong thing as teachers are forced to "teach to the test" instead of educate children. I recommend the work of Alfie Kohn to learn more.
How do you rate a good software developer with a bad one? Software development is a but different than most professions. Counting completed Jira tickets solves for the wrong thing as developers are forced to game the ticket system rather than optimize for business value. /s
And yet somehow we continue to hire and manage software developers, evaluating their performance holistically.
What is it about teaching that supposedly makes skill so uniquely opaque to administrators that it's (teach to the test) XOR (pay by seniority).
Software development is a far more evaluable profession than teachers. Most of the "problems" that bad teachers create don't show up for a few years.
Contrast that with code that doesn't compile/link or requires way more QA. Or personality issues that are sorted quite easily by a functional team/leader.
Teachers are more like naval vessel commanders than software engineers.
If the education experts can't tell the difference why bother trying to find good ones? Pay low wages and scrape the bottom of the barrel, there is no measurable difference between any of them right?
