[illumen]

Karate expert wanted, 7 years experience (not 3).

More than 2 * more libraries used, 2 times more projects, seen the language evolve, worked with 2 * more people, etc. Domain knowledge is a massive help for people doing things. The 7 year person has likely used far more things than the 3 year person. However if the 3 year person knows how to use a gun, and the 7 year person only knows how to use a knife - then the 3 year person wins[1]. Of course, many times the gun turns out to be a water pistol - or the 7 year ninja can fart in their general direction[2], wait for a flinch... and then throw the knife!

1 - don't bring a knife to a gun fight.

2 - monty python reference.