I'd say it's about the attitude of the employer and their needs. The kid who loves working on hot rods and is great at it can probably make a good jet engine mechanic as well, yada yada. Some employers are more concerned with raw talent and aptitude than a tool specific skill. They figure they can teach you to use their tool but they can't teach talent. They'd probably want to see what you can do in Poser, even if they don't use it themselves. Others are going to be the opposite - maybe they don't have time to teach the tools or they just don't want to. Some people are probably going to tune you out as soon as you mention Poser but I don't think I'd necessarily want them recruiting for me.

"Democracy is a pathetic belief in the collective wisdom of individual ignorance." - H. L. Mencken