Nothing wrong with light olive oil. Good smoke point for cooking and liquid. Medium chain triglycerides in coconut oil are great but no rule that you have to use it all the time. Whether your paleo or keto:
GOOD FAT: coconut oil, olive oil, avacado oil, lard, butter
BAD: sunflower oil, canola oil, vegetable oil, soy, peanut oil. These are the nasty super processed industrial oils packed full of omega 6 that lead to inflammation. I personally stay away
I generally prefer olive oil for cooking but take mct oil to help with quick energy and ketosis. It’s having my cake and eating it too…provided it’s an oil based cake