I brought both my boys up to be independent and the edler left to go into the army at 19. The younger boy went flatting -with 5 girls! - at 17.
But it didn't stop them coming home for regular visits, talking over their troubles and having a good feed of Mum's home cooking. 
In most cases they solved their own problems and I was happy about that.
BUT it didn't stop me worrying, however capable they proved themselves to be.
In later years, it's been the troubles brought about by other people's evil acts which have impacted on them and meant solving the problem has been taken out of their hands.
Sometimes, all you can do is pray, hope, wish, make a cuppa tea and tell yourself 'this too will pass'.