can't make an omelette without breaking (some) eggs
To achieve a certain goal one must sometimes incur damage, experience difficulties, or make sacrifices. — A proverb.
When we drove across the country, we put a lot of mileage on our car and had a flat tire, but it was a pleasant trip. "Well, you can't make an omelette without breaking some eggs," my wife said with a smile.
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Source: A Dictionary of American Idioms