Why the hell does malay and italians have shipwright?

As a general rule, civs with strong water bonuses(viking, saracens, port etc) typically dont have shipwright because of balance.

But then they give shipwright to italians and malay, who already are the best water civs in the game. Now, water battles typically dont go late-imperial, but when it happens its kinda annoying that you cant fight these civs at any stage of the game.