On the Side Quests of Life
Call me crazy, but sometimes I think life's timeline is a Git repository, and the different branches are Side Quests, which are (if we follow the analogy) enhancements of your central life. You can merge Side Quests into your Main Quest, integrating these improvements in a streamlined way.
Missing activities in your Main Quest may harm your later life if you keep playing the playbook of the path you're travelling to (e.g., not going to high school may hurt you if you try to enter the corporate world, but if you prefer to be an independent worker you may do well in life, given you genuinely put your heart at it).