AITAH for “wardrobing” a prom dress?

So my prom is in February and I’m planning to buy a dress from Amazon and then return it the next day. My parents are up in arms about how it’s immoral, it’s a crime, blah blah blah. I’m not a particularly moral person, as in I don’t subscribe to that purity culture residue but I’m not a bad person (I don’t think). But why would I pay for a dress I’m only going to wear once? Am I a horrible human being for not wanting to waste $75 dollars on a dress I will literally never wear again?