My mom doesnt want me to be serious with a guy until I accomplish my dream...?

i really really really want to be an anthropologist when i finish college. i want to travel to a lot of differnt countries and study cultures and learn languages and write about those sorts of things. my mom understands how much i want to do this and she said to not get too serious with any guy until i accomplish my dream. i want to get married some day and have a family. is it really a good idea to make my dream come true before having a family?