It's not though.

The British didn’t cause the famine, they “just” made it worse.

It's a common misconception but there are a few issues with "didn't cause the famine" for me:

1. Potato blight != famine. There was a potato blight across all of Europe at the time. Ireland still produced more than enough food to feed itself even in 1847, the worst year of the blight. It wasn't a case of making it worse, they literally wouldn't have gone hungry at all.
2. The only reason Irish peasants were so dependent on a single food crop to feed themselves was because it was what produced the most calories for a given area of land. The British stole the land from the Irish then forced payment at such a high rate from the people they stole it from that it left no choice but to use that single crop to feed themselves. They had to use their remaining non-potato land for higher value cash crops to pay rent on the land that was stolen from them.
3. An enormous number of people died from exposure after being fucked off their land and having their homes burned to the ground because they couldn't afford to pay rent to those landlords.

So the British did cause the actual famine in it's entirety and the deliberate lack of relief was seen as an act of God / retribution to reduce the population here (which they 100% left to starve, with some kind landlord exceptions).

It's why the Irish don't call it "The Famine" any more. It's "the great hunger" here because there wouldn't have been a famine at all if we'd just been left the fuck alone to grow a variety of crops instead of being raped and pillaged for hundreds of years.