Spa area/locker rooms I totally get, but for a pool that has rules to wear swimwear, not sure it makes the most sense to have a staff consistently making the rounds scolding people.
My thinking was also they probably don't want Instagram photoshoots or long loud phone calls in a peaceful relaxation area, but there's probably smoother ways to enforse that.
Either way, the pool is lovely and the cold plunge tub in the spa area might be my new favorite hotel amenity