I long practiced deep watering when I lived in coastal Los Angeles, which doesn't get tons of rain, though usually a lot all at once when it does rain.
In northern coastal California, we had a lot more rain, so I only watered at all during the dry months, fairly deeply and not too often for grown shrubs, more often for new plants without big rootballs. In both those cities I had terrific soil to start with and also amended.
My "soil" here in New Mexico is simply sand, and very porous. My tactic is to go for native plants or some known hardy shrubs like lavender and rosemary, hardy in that they take heat and our amount of snow and don't need a lot of nursing care, and are quite drought resistant when established (though it seems this year I've tried to kill them with too little water). I should grow veggies in a raised bed system, but am presently too lazy.
Anyway, I don't water as deeply here as it is just pouring it down though the sand wastefully - as I don't add amendments/compost as I used to in other climes. So I water more often, especially in our hot summer time. Otherwise, tough love all the way.