It turns out that accommodating spoiled aristocrats who order shit they don't need from halfway across the Earth on a whim has a cost, and let me tell you: that cost isn't coming out of the executives' salaries!
Every time you return something, you are adding data to a spreadsheet that returns the value of "fuck you."
It's always a risk assessment. If the cost of preventing something might go wrong exceeds the expected value of what it's going to cost me to prevent it from happening, might as well let it happen in the small % of cases it happens and eat the loss.
now if they could make it a crime to disingenuously return things and have cops (public treasury) deal with it, lord knows you'd need a doctor's note to return a malfunctioning vibrator, but there's more pressing aspects of the profitability crisis they'd rather be bribing politicians over right now