Utterly sad. There is no problem. The problem was fixed. Years and years ago. You press a button and you see all the interactive spots. Bam! no more pixel hunting.
This is a sad reflection of a part of P&C devs that are for some reason oblivious to this solution and still design their games on pixel hunting. Case in point, the highest-profile P&C title in years, Broken Age, has no Hotspot indicator and doesn't allow you to skip conversations.
I don't like that solution either though. It reduces a lot of the fun of observation from the mix.
The best solution is actually integrating immersive cues into the mix. People perhaps glancing at certain areas nervously; a light shining off a coin at intervals; a specific sound effect indicating an area of attention. In this sense, you give nods to the player as to what perhaps might be of interest, without removing the sense of exploration or discovery.