No, all hotspots are highlighted. That's kind of standard behavior for point&click adventures as far I recall. The feature is meant to spare you the pixel hunting, not to guide you through the plot.

I probably play about 15 adventure games per year and don't remember one that implements the feature you're asking for. _If_ a game offers hints, then that's usually done through other means than hotspot highlighting: A diary, clicking on the main character, implementing an in-game character you can ask for help, etc.