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Very good points and i mostly agree with you.

The yellow paint is very much a balancing act and especially in games like Resident Evil and many other horror games where recource managment is big part of the game making loot to stand out is very important.

If the breakables are easy to miss players will become frustrated when they dont have enough bullets or healing items to progres in game. If devs add loot so much that even blind players find enough loot, then sharp eyed loot goblins will have too many recources to have a challenge. Some games play around this by pseudo randomising the loot and making sure that if some recource is low players will allways find enough >!(The Last of Us does that and if you notice it will ruin your immersion even more. There is no reason to save any recources, because you will allways get enough for the next encounter)!<

Same with games with climbing mechanics. If the game is build around it and is fast paced you will hate the game when you die because you jumped against wall you cant climb.

Im fairly certain that most people who get annoyed about the visual cues would be even more annoyed without them.