Certainly at the tech level I know that training is something that you are best investing in for yourself. I can't speak for what is typical at the management level.
How many managers are trained to be good managers?
I have seen management training. Some of it is very good indeed. Some of it would be good if the attendees were given time to embrace it. I've certainly seen people who have had to abandon management courses because the pressures of their day job as managers just didn't allow them to make the commitment required. A decent course does require a good deal of time and effort.
It would be harsh to say that the people who got the most out of the course were those who were best at directing their work to other people but there would also be a few home truths in it too.
I'm coming to the end of my career. Of all the managers I have come across I think 3 were exceptional and 1 of those was exceptional even by exceptional standards. They were different in almost every way. The only thing they have in common is that they had a talent for making their staff
- Feel valued
- Feel they were achieving something
- Feel they were doing something worth while
Those are managers you stick with and perhaps even follow to other companies. In their case there was a lot of natural leadership talent though I know that at least one spent a lot of their own time and money on career coaching and in finding a mentor.
My perception (and I could be wrong) is that management education may be even less well resourced than technical education.