That's a very different claim from "it's always wrong to talk to 'dead' people" or "talking to 'dead' people is necessarily necromancy". I don't object to your reformulation, at least not much.
If you think it's necessary to trash Catholics, I think that's too bad. But if you make up claims about what Scripture says that are at variance with the little leather Bible I keep in my desk drawer, don't be surprised if I call you on it.
Sorry but perhaps I wasn't clear. It was wrong for Saul to seek help or advice from the dead Samuel. It use to be punishable by death. The Lord exacted that punishment. That was then. This is now I suppose.
Lest you think I'm picking on Catholics I would stress that I'm equally "vile" with many Protestants. I can tell you I'm not the brightest bulb around but I see little sensible reasoning among many Christians today especially Protestants. Thinking is a dying art replaced by our five senses.
As Ben Franklin once said, "The trouble with common sense is that it's not too common."