I’ve heard multiple times that it’s not okay to allow any food to go down the drain even with a garbage disposal, I guess because solids shouldn’t go down the drain. But we put a shit ton of solids down the drain through the toilet and that seems to be fine. Does the toilet go to a different sewage pipe then the sink? Or does shit have different properties that make it dissolve better?
The type of food that’s the worst for pipes is fats, oils, and grease. You should never put any of these down a pipe because they can solidify and cause pipes to burst. Restaurants are required by law to have a grease trap for any grease that inadvertently goes down to minimize the damage.
The occasional vegetable scraps going down a residential garbage disposal will not pose a huge problem, but keep out any fats, oils, or grease.
If not for food waste, what else would you even use a garbage disposal attached to a sink for?!