I think you're right on the money, with a single exception: there is a value to engineering managers being trained in professional management skills. Honestly,

I think you're right on the money, with a single exception: there is a value to engineering managers being trained in professional management skills. Honestly, most of the dysfunction I see in orgs is as a result of "senior" (read: tenured, not skilled) engineers being put in charge of teams/work without having the competencies needed to be successful.