I think kukx's point is more that wishing isn't effective, especially when the person you're wishing for is already dead. The obvious follow up is the question of whether or not it is correct to do ineffective things, and why people would choose to do so with such frequency that it is normalized and expected. Thus the "why wouldn't you wish it" is because wishing doesn't work, and that's probably the best possible reason to not do something.

Simply rationalizing it doesn't make it a good thing.