Also, I frequently watch morons turning right move as far right into the shoulder as they can hundreds and hundreds of feet before their turn, so then they have to either come to a near dead stop or swing back out into the travel lane (or both) before they complete their turn so they don't hit the corner of the curb.

Just... don't do that?

As you have correctly observed, the correct way to clear the corner is not to turn too early. But it is also to not deliberately start out as close to the obstacle you're trying to avoid (the corner) as possible. You'd think that would be obvious, and yet.

These are the same dillweeds I see pathologically swinging into the furthest away lane every single time they make a turn from a single lane onto a multi lane road, as if they're afraid turning the steering wheel past 15 degrees will cause them to spill their beers, or something.