So, I can speak from personal experience here that your assertion is simply incorrect.
A few campaigns ago on the EU server, Vanguard were consistently outnumbered, this forced us to do a few things in order to become competitive and win campaigns:
Make Allies - we made friends with guilds who could fight with us, this reduced the oppositions numerical advantage.
Employ a strategy that would nullify our opponents numerical advantage - Take fights we knew we could win(despite being outnumbered), harass and win points when we knew they could not contest, last-capping forts, circle-standing outposts, etc.
Work on our tactics and synergy - Make yourself more militarily effective.
Reduce our oppositions number - We recruited some of their members.
We had a lot of fun, it made us *more* competitive and in the end, we are a much more solid guild for doing it. Being outnumbered or outgunned can be frustrating for some and seen as a challenge for others, what is important is having the mentality and the foresight to improve and work the situation to your advantage. Relying on game-devs to do that for you cheapens the experience in my opinion.