Shaw quote interpretation

What Shaw means is that some characteristics that somebody has can make them highly respected in one group or "class" of people, while that same quality could be seen as a negative or peculiar in another. For example, an agressive real estate developer with an aggressive sanitation worker, both have the same qualities, but both are judged differently. That's because real estate developers are expected to be aggressive, and society requires that attribute for that particular job, but not for sanitation workers, they're not seen as people who are supposed to be aggresive, their field of work does not require that quality, and society does not demand that trait from them or their job.