The job of the teenager is to learn to know him/herself and settling on an identity.
Some don't figure out "who" they are 'till they're past the age of 20 and so us older folks (since you set the bar at 25 I'm counting myself

) are more settled into our self-identity, and thus more emotionally prepared.
Sometimes I see youngins (15-20 yr olds) that seem to think this will solve all their problems.. that seems almost nonexistent amongst folks over 25
so..
Maturity, Realism, Confidence,..
and us adults can have a place of our own, a solid job, etc.. so...
financial preparedness, less chance to be kicked out of house and home,..
And we've had more time to find good friends and perhaps partners who're willing and able to support us emotionally through this difficult journey..
That's all I can think of just now, but those are all very good things.