Isn't this how all pvp is?
It depends on the context I suppose. In a 1v1 fight the statement it true due to the lack of options one has to beat an equally skilled opponent. In group fights their are considerably more variables that will determine the winner. I guess if you watered all those variables down you could consider them mistakes. An example of this could be in a 5v5, 2 from one team focus 1 on the other and make it so regardless of the block direction the 1 always takes damage. If the 1 isn't experienced in positioning and movement then death will occur. That could be seen as a mistake yet it doesn't deter from the fact that in a 1v1 situation their are a lack of options when it comes to dealing with someone equally as skilled.
In MO1 you were able to get around block's, it wasn't easy but it was an extra tactic you could apply to 1v1 combat to damage and pressure your opponent. I feel that its much more difficult in MO2.