There is a ninja skill that allows a me lee character to do surprise attacks
Stealth Archers can use Surprise Attack as well. They can also use Backstab. Only Stealth Melee can perform Focus Attack or Ki Strike, or use Death Strike effectively. If you're just popping out of stealth to initiate your first attack, you're better off using Dismount than any of the Ninjitsu abilities, including those that can only be initiated from Stealth (Surprise Attack, Backstab).
Stealth Archers also have a much greater ability to get away when they fail to land a shot from stealth. They can shoot off a Dismount from 8 tiles away, and if it misses, move one tile away and immediately hide and stealth around. They're only visible (attackable) for a split second then.
Stealth Melee on the other hand, first have to sneak into melee range, then attack, and if the attack misses, they have to get 9 tiles away from the target before they can hide and stealth. That's if they don't use a Smoke Bomb, or land a hit with Shadowstrike (even then, i've been passively detected before when stealthing away after just landing a Shadowstrike).
Stealth Archers are exponentially safer and easier to play than Stealth Melee, and are more effective because of their range. It's why Stealth Melee are practically extinct, and Stealth Archers had rule over the land for years.