You are correct that access can be coerced. However, it's a question of cost and thresholds and consequences. Few courts will punish law enforcement for taking

You are correct that access can be coerced. However, it's a question of cost and thresholds and consequences. Few courts will punish law enforcement for taking your camera and looking at the images without your permission. They may be inadmissible in court (or they may be admissible) but they will have that knowledge. Most (some?) courts will publish law enforcement for using duress or coercion to extract information which could be legally concealed using your 5th Amendment Constitutional rights.