Actually the most humane way to kill them is to do cervical dislocation which takes about a second.
And even a skilled hunter can make a mistake or miss.
'A joy to watch him hunt'? It's a snake eating a rat where both are contained in a 4x2 or 6x3 box. Hardly hunting. Thats like being proud you shot a fish in a barrel lol.
And eating a FT or live rat both uses energy and power. Not sure about your boa but mine slam FT rats and rabbits with authority. You want real power, get a retic. They take eating to the next level. Caesar slams his guinea pigs so hard he rattles all the doors in the cage stack. It's actually kind of scary.
And you can enjoy the snake doing 'its job' until it misses and get bit, then you get to do your job of taking it to the vet lol.