For inexperienced keepers, sometimes jumping to live is just easier for them. Sure we could sit and explain various methods for enticing a BP to eat, but none of the methods are guaranteed and it might take weeks to see results. Inexperienced keepers are often overly worried about their snakes not eating so getting them to eat ASAP is a priority for them. If it means feeding live at the next feeding, then so be it.
It all just comes down to preference. Neither answer is right or wrong. Do what works for you and keeps your animals healthy!