Roch. Seriously.
1. Who races with a "set speed limit"? I know Formula 1 cars have an maximum engine, but you still tinker with the aerodynamics to make it faster. Your analogy is moot, thar's wasn't.
2. Something is being done about it. The attack gap on new worlds will make using these to gain an edge pretty pointless. When I use it on .net I get 150ms trains. I get the same when I go 2-click-2-click.
A better car analogy (if you need one), is that instead of driving round in a Ferrari, instead of a Ford. I'm obeying the speed limit, so it's fine. I just prefer the Ferrari.
3. The attack gap won't be enforced on older worlds. Why?
When en1 was asked "Do you want 1 packet nobles?", they all said "Don't change the settings of a world in progress"
When .net was asked about a widespread fake limit, they all said "Don't change the settings of a world..." (except me, I like the fake limit ¬_¬)
Sure, they implemented a attack gap on .net anyway, but when you consider that the lack of a gap is (one of) the reasons why many players came here from .net, I don't know if it would be that popular. Some people came over expecting 4ms trains, and have come to expect them from their worlds.
To alter that setting would be wrong now.