I'd be happy to open a debate with you. For one thing, science is supposed to react the same under the same conditions, no matter how often or who preforms it. It doesn't matter who mixes baking soda with vinegar, you'll get the same reaction. And yet, if you and I performed the same spell, I would have a reaction, no matter how small, and you'd have none. And if someone more powerful than I cast the same spell, it would be different again.
No? You didn't get an apartment here when you arrived?