Lack of interest in a topic by the editors sounds lazy to me.
Is your lack of interest in any topic that doesn't interest you laziness on your part? You say you don't like Sudoku -- by your logic, that's just because you're lazy. Does that make sense?
Seems you should put more on to show some interest outside those of just your interest.
Why? Are you obligated to be interested in stuff you're not interested in? No. Why should we? What doesn't interest me may well interest someone else. That's the beauty of volunteer-driven projects like the ODP. And understand: when we talk about people editing only in categories that they want to edit, that doesn't necessarily mean they are interested in the topic of that category; it only means that they are interested in editing that category. For example, I've edited tons of real estate sites in
http://dmoz.org/Regional but that doesn't mean I have any interest whatsoever in real estate sites.
One moderator says Precision Fasteners are not big topic.
Actually, if you reread my post, I never said they are not a big topic. I said "...precision fasteners are probably not that thrilling to most people." Which is true of many topics. What interests one person may not interest another.
I don't like Sudoku, but my wife does.
Would you want us to force you, if you were an editor, to edit a Sudoku category? If you wanted to, great. If you didn't, the Sudoku category would have to wait until someone who did want to came along. It's the nature of the way the directory works.
I won't bother you with my opinion of your lack of interest anymore. Seems you are not ( maybe not you exactly) not interested in busineses that do not open your eyes.
We each of us only have so much time out of our days that we devote to the ODP. We edit where we have an interest in editing. That shouldn't be surprising. That doesn't mean our interests are limited to the areas where we choose to edit.