The way I see it is that those "geniuses" will only answer questions like "what's this button does?" and "what's included in this package/option?". Basically
questions, but no, we can't tell that to potential customers.
If a customer is interested in a car enough to go to a dealership to look at it more, he/she has done their homework and knows whats up.
Also I don't know how busy the sales staff is at your location but at my dealer they are free most of the time and would be happy to answer any questions. Any time I would go into service, the SAs would just walk around showroom, can't imagine MORE staff to "help" customers. But again this is BMW with some of the recent shit they came up with this might even sound like a good idea to them