In my opinion, I don't think you should expect to win all the time, no one is entitled to give you a fair fight, but since PvP is such a big aspect, if you won't give "Fair" fights, you won't expect more PvP instances from the other party, as they would just avoid you or do as I said in the paragraph below.
This might be good for some, but also bad for some, as sometimes people fly for PvP only or for the RP and then the Pews after, If you make the opposite party mad because you brought a Gunboat against 3 Snubs when you already had 3 Snubs at your disposal, expect them to do the same, such as bringing a Battleship and two Cruisers against two of your Battlecruisers. And the cycle continues on and on, creating these ridiculous ooRP hatred and grudges, making both sides avoid each other.