But less doesn’t mean nothing at all. So depending on the soil, you definitely need irrigation.
There are people who deliberately pour gravel to create a dry location. That barely holds any water and doesn’t have to hide in front of your sand. ;) In other words: for every soil and every climate, there are suitable plants. Possibly you just can’t play golf on it then. Irrigation is only absolutely necessary for the vegetable garden, since there is simply no drought-tolerant alternative. But then you get vegetables in a quality that you can’t buy. I also think that much of this topic is due to ignorance. People do certain things because that’s how it’s done, and then it gets automated with robots and irrigation systems. I see it with myself; the original garden was also quite "normal" planned, and the more I deal with the topic and the more conscious decisions I make, the further the new plan moves away from that.