the only 3 reasons why I want my BP's to eat F/T are

1* It saves a lot of time, not having to stand and keep an eye on every bp till he/she takes the prey.
2* By feeding F/T I can buy in bulk and I do not have to go to the shop every week.
3* Where I live F/T are cheaper then live prey items.

That being said, I do breed my own rats, if I would feed all my snakes live prey i would have to keep all the rats alive, meaning loss of a lot of space for cages, money on food and bedding and time for cleaning all the rat cages. now I just humanely kill them when they are at the right size and then freeze them.

I do breed my own rats so I know where they come from, that they are healthy, that they get good quality food and that the rats are taken good care of because even though I understand it may sound kinda weird and twisted I do like the rats that breed for me as my pets.