Actually, to the point that you have been advised that a broader definition means more unfounded complaints, I think the opposite is true. I think the broader definition—and I think this echoes your point—means that there will be more cases, because more things will be found to be contained within that definition. That's not a bad thing, because recognize that even if there's a finding of harassment, it's on a spectrum and it may be a minor case of harassment, and it will be addressed in a certain way.
I would agree: I think broader is better.