That's certainly one way to look at it.
But let's say you're looking at why you're having trouble completing a project at work, and in turning cards you pull up one that speaks about passion, relationships, sex; no, on the surface, it has nothing to do with your project. But perhaps, by someone/something randomly bringing that up, you might realize that you're being terribly distracted by something in your personal life, or something along those lines.
Of course, not every card turn applies. But the methodology can work - for or against, I'll admit - in very strange ways.
Some folks read Bible passages 'for inspiration'. This is much the same thing. Others might try to 'tune out' their problems and watch TV - and end up doing the same thing based on something they saw on television.
Not everyone can see a problem they're facing from all available angles. Very few are trained to analyze a situation fully. Few realize just how integrated their lives really are. A missed cup of coffee in the morning can change whether or not you get promoted at work; subconscious worries about a sick relative might be an unrealized block in trying to woo your current love interest.
Personally, I hate psychology; but there is something to it, and different folks prefer different tools to use psychology on themselves.
Of course, you might also mis-interpret these random cards; the real trick is recognizing the potential for error in any line of thought. Just because you turn up a dark-haired, dominating female who is 'against you' in the layout doesn't mean you should immediately distrust your dark-haired boss at work. You may not even know someone like that; in which case, you assign that bit a 'meaningless' status, and push it aside.
I've done a fair bit of writing, and it occurs to me that tools like tarot or runes are a lot like pre-writing exercises. If you get writer's block, and just have to do something, you might write about a different subject altogether, or try word-association, or dozens of other interesting techniques. It's much the same - sifting through the ol' grey matter for some speck you hadn't noticed before, essentially. Like a holistic search engine.