Most players lack a few thousand perks some have to risk on a 262 mission into a horde. I for one lost all my perks from several years due to a name change which I didn't know would cause such an event. I personally am not afraid to use the perks I have now collected again but I know the majority of players lack the perk buffers to casually take one.
So either it's the dissatisfaction of surrendering under the horde or trying to fight desperately - both cases is a loss for the victim of the horde. If I have to give up to a horde it usually means the game just stoped being fun for me and I log off for a week. If it happens often enough it may mean I no longer see paying the monthly payment feasible. And that's not good for HTC. If hordeing produces player logoffs and/or quits, the balance gets shifted even worse gradually with the problem feeding itself.
I remember back in 2002 when euro-primetime login would in most cases produce a situation where your country was being horded to death with a couple remaining fields vulched non-stop. Whenever you took up you stood 10:1 odds - if you got up at all that is. That's by far not the only reason I quit subscribing back then but it was certainly a factor why I stayed away for years.
You don't need a perk plane to fly against the horde, but you do need a pretty fast plane to have any long-term success. P51's, P47's, F4U's, 109's, etc, can all be used. And the beauty of it is that you'll generally build perks pretty quickly, especially if you switch to the lowest-numbers team.
Personally, this is the type of fight that I love the F4U-4 for. I love that plane, but I really want to fly it in a challenging situation, too. Sure, it's perked, but not all that much. And I don't like jets...
It's a different type of fight, going against the swarms. It's a heck of a challenge, and it's satisfying when you can do it and get away with it. To be honest, I find it much more entertaining than a bunch of 1v1 fights.