Five things that prevent me from being convinced condi guard is as good as you say:
Burn on Block
Aegis and protector’s strike are the primary “repetitive” blocks, with a long cooldown between burns (15s and upwards of 30+ if you use retreat). This will only net you about 2-4s of burning on a target doing maybe 2k dmg every 15 seconds. Shelter can provide a lot of burns, but then you are left without a defensive cooldown/heal
Radius of Permeating Wrath
240 range from the player restricts a lot of potential burn effects, especially when a majority of opponents in pvp are ranged (engi, ranger, mesmer, necro) Even ele and thiefs kite in and out and will not be in melee too long. This leaves warriors and other guardians who will melee you.
This is saved “somewhat” by point defense needing people to stand on a point, but often it is ranged aoe that wins that point not standing inside of it.
Torch to Burn Targets
If torch is used as a primary way to burn instead of VoJ/Permeating wrath, it can only burn 3 targets at a time. This is not horrible, but it limits your aoe potential. Also has a radius of 180, even worse than permeating wrath. Better burn duration than blocks and VOJ though.
Survival to see Burns
Guardian’s use blinds more so than blocks to survive damage as they have more of that available. After that they rely on a lot of dodging. Without crits you lose out on vigor. This can be made up for with energy sigils and/or intellect sigils. After that they rely on self healing either via meditations or AH if near allies.
If you do not have precision or 6 down valor, then you lose out on survival. But now you lose 6 points that you could use for virtues and zeal.
so now your burning build either does aoe burns but at regular damage, or you do single target burns at 33% extra damage. (I wish they would make both more accessible maybe like 4/0/6/0/4 and you could have permeating wrath and amplified wrath achievable)
Time to burn
This comes up time and time again, but there is no burst with burning. So a direct damage build can front load damage and get a kill, while a burning build needs time. The more time you give an opponent, the more time they have to either heal through your damage or kill you before you can finish your damage.
It was already shown that while condi builds can do as much as zerker builds theoretically. It will always be “12 seconds” behind. (another post showed how much burning damage they could do with whirling wrath stacking 12 seconds of burning, but in 12 seconds you could get a second whirling wrath off and doing double the original burning damage)
I “WANT” a burning/condi build to work and I keep theorycrafting them and testing them out, but they are not ready yet.