I always thought it was just a pouch that made stones. It isn't. It's a timer. You eat, your body sends a signal, and the gallbladder releases one concentrated dose of bile, matched to the meal, at the exact moment the food arrives.
Take it out and the liver carries on making bile regardless. There's just nowhere to hold it anymore. So instead of one timed release, it trickles into your gut all day long. While you're eating. While you're not. While you're asleep.
Your digestion was built around that timer. Now it's gone, and everything downstream is dealing with a slow drip it was never designed for.
Nobody drew me that picture in four years of appointments. I found it in a video one night, and it was the first explanation that matched what my body was actually doing.