you can't say poser is never used professionally, if you go to e frontier site and read through some of the customer stories there are some who use poser in their professional work,  it may not be the only 3d package they use but there is use for it even if it is pre visiualization of an idea, but if all you know is poser then you will probably have a very difficult time breaking into the industry

You might as well PAY attention, because you can't afford FREE speech