The build-up and anticipation makes it better. Statistically, scantily clad is sexier than fully nude in all things from art to media because it adds a sense of mystery and draws the viewer (or in the sense of games 'player') in more, offering a 'reward' for patience and effort. It's the same with how most people find accidental nudity / ENF sexier than a chick willingly flashing her tits. The unexpected draws arousal more than 'here they are'. I personally think the dev has the right mindset.
BTW, there is a free hidden object game on Steam called "Boobs Hidden In Los Angeles" if you want a nudist hidden object game.