Olive oil is considered a better oil, but it doesn't mean you can have as much as you want.

It's surprising what you can cook and still get good results without oil. Not that I don't ever use oil, but a lot of times it doesn't actually add much to the dish.

Edit: You can for example saute veggies in water, maybe relying more on spices for flavor. And if you're really looking for some browning/charring, use dry heat from an oven or air fryer.