If that is what the subject of the talk was then I completely agree it would have been appropriate and rescind whatever negative thought I expressed in the parent. (And by "that" I mean "A practical guide to detecting caste-based prejudice and what to do about it.")

Care to elaborate?

It's this naive idea that somehow same tactics which have clearly failed in regards to white/black race relations, would work on a totally different culture. And yes, I know you may think that this woman giving this talk would be someone who knows a thing or two about the Indian culture, but you would be wrong. All she knows is how to sell an offering which western executives would pay for.

Lemme put it this way, if the solution required to fix the problem could be one of the following, which one do you think you would go for:

1. Performing caste cleansing rituals throughout all teams

2. Hiring a caste system expert to give a talk in the company

3. Identifying the troublesome castes by their surnames and making special reports on managers with that caste names regarding any issues of caste discrimination.

Which one of these options would you go for?

Even if the effectiveness of the option 2 is the least, it still would be the most preferred option by all companies because it's the best bang for their buck. In fact, even if these talks were actually toxic for the morale of the company among the Indian diaspora in your company, this gives the most 'color' of action by the company (and when companies like Google resist as in this case, they look bad).

End result: When you need a quick and expedient action to be performed in case of dealing with an issue you have no real understanding of, you are bound to hire scammers whose main job is to give you a totally fake service with no outcome being achieved.