Managers and trainig
Yes, and I have been in business over 35 years. From time when everyone got some training on management (just in case) but before "sensitivity" training - heh! Yes, you had to have a thick skin in IT but also you were treated like a human being.
You are right, it's actually early 90's when the signs came up, managers didn't get any training (I don't count PMP or such which are almost useless!) but started to be more like politicians fighting their own turf - a downfall for many companies and corporations! Used to work on some with billions revenue!
There used to be and I'm sure still are many very good management education (NOT training!) courses (or actually camps or whatever) but mostly (IMHO) they have turned to money making business same as for example the IT certification and other IT business. Used to teach both in 70's and 80's - educate and sometimes but seldom training!
And once again, even salaried CEOs are employees of the company - they, as managers and others, work for a company, not for "a manager", so forget that or ask IRS who's actually paying your compensation.