Metrics are not bad. Story points and velocity are usually bad metrics though.
It's not a coincidence the consultancy sector uses scrum. They get paid for their output, usually by the hour, and scrum measures output.
If a consultant implements a load of useless features that make a product worse, but do so very quickly, then that's a great success for them. It's not fundamentally different from rewarding developers for the number of lines of code they write.
Well anyway, managers in my current company are dumber than second coat of paint and I inflate points.