How often...

I'm so confused! Half the people I know who have gotten pregnant had sex Daily, sometimes 2-3 times a day! But doctors say it's best to BD  every other day. What if the day you skip is the day You ovulate? Wouldn't it make more sense to do it every day to ensure you don't miss the day you ovulate? Any mothers here reading this and if so when you conceived had you been doing it every day or every other day thank you