The attacker's advantage in the 2s-rule (when he traps you with this rule) is not optional, it's not unrealistic, it's the daily truth of this game. If you can dodge an attack, you can dodge an attack, whether you're standing diagonal or not, shouldn't matter.
The 2s-rule is purely there to make the game more exciting and more exploitable for die hard players and the vast majority of the players worldwide are not aware of this
Thx to the ISF and the game manufacturers who have the same vision, namely making the rules very short and "simple" to understand and it's with this lack and vagueness in the rules of section 11.3 that this 2s-rule is so debatable
If you want to know why, then search for my posts about it and you'll find it.