To be honest, I think I'd prefer it if an owner admits that they no longer have the time and interest, and passes the snake on to someone who does. It takes guts to admit when you've been wrong, hold your hand up and ask for help.
This way is a win-win-win. The original owner is relieved of a responsibility they can no longer handle (for whatever reason), the new owner gets a much-wanted snake, and the snake has a new home where the owner will be more attentive to its needs.
The alternative woulkd be for the original owner to keep quiet, possibly neglecting the snake, and the snake suffers.
People's circumstances and lives change - Corns are with us for up to 20 years, maybe more. When any of us buy a Corn, I'd lay money that none of us can be absolutely sure that we'll be able to look after it for its entire lifetime. Illness, job loss, family situations, growing responsibilities in other directions... There are a lot of variables that could affect our ability to care for our Corns in the future.