I think you're mixing up "realism" with what the rules say. There are dozens of places where the rules don't follow "realism", and yet we still follow them.<br/><br/>For example, if someone with 200 HP is dropped to 1 HP, they can still function fully, but if they are pinpricked for even 2 damage, they suddenly go down. Doesn't really "make sense", but we still follow the rules.<br/><br/>Another are the jumping rules. Are people (average strength and dexterity, no training in running, effectively a +0 modifier), with a running start, going to jump only a single foot 5% of the time, and 20' 5% of the time? Again, not realistic, but D&D isn't based on realism.<br/><br/>And I don't see anywhere where the rules say that you don't need to make an additional attack to confirm that the free action spell hits despite how realistic or unrealistic it might be.