You don't have to faff around with f8cking ice trays of tiny bits of puree which fall over the kitchen floor when you give up and whack the tray to get the buggers out and reduce you to pathetic weeping as you see your careful organic work splayed over a surface which is so far from sterile you canNOT resuscitate the damn things.
Also your baby is less likely to look at you with wearisome disgust and spit out your nipple.