This is rational. You understand the mistake and know your time is valuable but know trying to force someone’s hand to pay you for your time when it was a simple mistake is not how the world works. I’m sure the company would be more than happy to reimburse you the shipping costs for replacing this way if you called and talked to them and rationalized you reordered because you didn’t have the time to wait out their policy. Far better than trying to bully them to change their policy.They would likely do that, albeit with a hold on your credit card for the amount until the the previous product was returned.
I’ve had this exact situation happen to me. Super excited to receive a product and the wrong item showed up. I’ll admit, I was bummed but such is life. Immediately went to the website, repurchased the product so it would ship that day then made the return request. My time is far to valuable to waste sitting on endless phone calls or back and forth emails, but to each their own.