It must be remembered that there was still enough wheat, oats, barley, butter, eggs, beef, pork, and lamb in Ireland, even in this famine year of 1847, to feed for a year four times as many people as were leaving the country. But all this produce was still being sent to Liverpool on the very same ships that carried the emigrants.
Pretty much everything we get told about the famine when growing up here in Britain paints it as an unavoidable tragedy, with any mistakes being on the part of the Irish, and with Britain as the charitable saviour.
This is not true. The Great Famine, as with many other “natural” disasters, was a political issue, with the ruling classes at fault. Britain may not have had any control over the blight, but it certainly had a hand in creating the conditions that made it such a disaster.