That's because workaholics think they're normal and everyone else is lazy. In reality they usually either trying to hide from something in their personal life, or they really are just that boring of a person that they can't think of anything better to do than work.

This is not the same as being passionate, since that usually involves doing something for yourself rather than for another persons business.

I used to be a software developer and I enjoyed being a software developer, but I honestly couldn't give a crap about the proprietary accounting system or whatever it was that we were developing for the client. That stuff was hella boring