Nothing erases you from existence. They clearly have no idea what they were talking about.
The reason we consider certain spells more advanced than others is because of the level of preparation, time, and dedication involved in the casting of these spells. We also factor in the ammount of energy that may be used at the event of casting. If you feel like you are capable of performing a more advanced spell with confidence, and conviction, then go ahead and do it. If not, then you might want to consider an easier alternative.
Just because a spell is "more advanced" does not mean it will work better than that of an easier spell. Why I cast easier spells often and get fantastic results all the time.