The people who are doing the work in programming are not assertive on average and are prone to be taken advantage of.
This is not a criticism; in a way you need to isolate yourself from realities of human politics to be successful in the field.
So in the last decade many socially dominant people who smelled the money have invaded open source. They have realized that you can make a living by posing as team leads and not doing much.
The real workers have let them in, have given them power and are now facing the consequences (ha, finally we can use that term, too!).
Other professions like law and medicine aren't remotely as naive. They are acutely aware of power struggles, protecting their professions and won't let this happen.