Exactly
These 30 day return deals at box stores, sure you can take your snake back, so can everyone else. They then drop that snake right back in with the others in the store to spread whatever it may have picked up from living with the person that returned it. Then fast forward a day or two, someone else buys the snake with no knowledge that it's already been sold and returned and may have an issue. Your logic, or so it seems, that this is a better system than what the breeder offers is quite frankly ridiculous.
Most return policies set by breeders are there to ensure that you get what you pay for. They give you that live arrival guarantee, and 24 hours to identify any issues, with the snake, not issues with you or your husbandry, but with the animal. The return policy isn't there for you to utilize because you decided 5 weeks down the road that it's too hard.