What utter nonsense.
HP are a reflection of the gear they are using - not the skill of the player.
As with all forms of the internet, such attitudes come down to the e-peen waving brigade snobbery.
"Lol I has BM gear and you don't, nubcake!!"
It's quite frankly pathetic.
I a joined as a new level 50 WZ with 11.5k, as the second round in Voidstar was starting, my friend was with me, same position. Neither of us were in PvP gear, even with half a match my friend came 3rd in the ranking in damage, and I was 5th - and this was with the rest of the team with 16-20k HP.
But whatever, I find it's usually the players taking this line, are the ones that need high-end gear to cover their own deficiencies as a player, because on level playing terms, they'd probably realise how crap they really are.