Do you want to sell your game to as many people as possible? You have to make your game as accessible as possible to as many people as possible. And that doesn’t just mean your 300-year old voodoo grandma from Louisiana. Your game has to be user-friendly even for the average modern Twitter user!
And it has to be mandatory. It should be enabled by default (the average modern gamer might not find this option in the game's settings and get offended) and, preferably, shouldn’t be able to be turned off in the settings (the average modern gamer might accidentally turn it off, forget about it, and get offended).
I like how it was implemented in Zelda’s Twilight Princess (the scents feature). But in other games… Is this some clumsy painter who spilled a ton of paint everywhere?
But on the other hand, remember the pre-rendered backgrounds like in Final Fantasy 7+? How many times did we run back and forth through a some big location simply because we didn’t know there was an “interactive object” (like a door) there since it looked almost identical to the background? And, what's worse, how many times have we been unable to walk through a door because it was just part of the background and wasn't meant to be used by player? And that affects the gaming experience - if you've failed to walk through a door 10 times (because it's just a non interactive drawing) you won't even try anymore.
In early 3D games, especially shooters, this was sometimes a problem because the interactive button/lever you had to push/pull to open a door (the most common puzzle of that era) often looked exactly like the rest of the textures in the level and could resemble a tree root or a crack in the wall.
Do you remember the old point-and-click adventures? They often became pixel-hunting games, just to randomly find an interactive pixel on the screen. So, your game resolution is 320x240, the play area is about 320x180, and your interactive object is 2x2… Good luck finding it.
But with modern game design knowledge and super graphics (like from the last 15 years or so), if you’re splattering paint everywhere, it means you’re lazy (or your business analysts have provided you with evidence that your target audience is retarded). The stones on a frequently used path will be worn down. And it’s noticeable. If the graphics engine isn’t capable of rendering this (or not in all quality settings), the character might comment on it (via text or voice). “I think the princess’s kidnappers passed right through here - they never wash, and you can really tell”. And so on.