Or using the word "bandwidth" to refer to "capacity" or "data throughput" rather than "the width of the band that the signal occupies". Arrrrgh. Yes the two things are the same for certain naïve modulations, but the whole point of using a better modulation is that you get more throughput for the same bandwidth. Understanding this requires first unlearning the abuse of the term, and that's hard work for a lot of engineers who really need to understand this.