Well, with my sample size of one, I've splashed boiling water on the floor when trying to drain pasta or potatoes, but never while pouring out a kettle. Perhaps related, a kettle has a cold base in addition to a cold handle oriented more appropriately for pouring.
I don't think this is true. The mechanics are essentially the same. But the colander receiving the pasta + boiling water is situated inside the sink, which will catch the water that is in that case intended to spill out.
The pot is situated on the stove, which is a raised platform that can't catch water at all. Any spill there will splash all over.