Um what? Your ECs are just fine. Editor, captain, community outreach, semi-professional experience. Plus you’ve got legacy at Yale. If you’ve fallen in love with the idea of Yale, then you should apply SCEA. Forget about this chancing nonsense. No school at or under 25% is a safety. By definition, that means > than 75% of kids get rejected.
Just make sure your essays are eloquent and represent you.