No, other games wouldn't salivate to guard cause guard just locks you out from doing anything for 5 seconds, that's like a free stun if you stay in it for the full duration.
If you've been playing PvP in various MMORPGS then you would know that others games have many defensive cooldowns and abilities for EVERY class and job. Example
WoW: Priests have pain suppression to reduce damage by 75%, USABLE while stunned and if they don't have that up they also have a passive called Focused Will, a passive level 34 Discipline and Holy priest ability. Upon receiving any melee attack, it grants a 15% damage reduction buff lasting 8 seconds. This effect stacks up to 2 times for a potential 30% damage reduction buff AND SHIELDS which absorbs a good chuck of damage(unlike our game shields). Shadow priests spec have Dispersion is the main defensive cooldown for Shadow Priests. This reduces all damage done to you by 60%, USABLE WHILE STUNNED with a 2 minute cooldown with many other tools to reduce damage by *alot*
Druids have barkskin, reduces damage by *alot* usable while stunned and when they get out of stun they can go bear form which can increases their armor to insane tank levels to tank 3-4 dps beating on them WHILE having HoT effects on them.
Star wars also have defensive cooldowns, many of them activate by getting stunned or able to be used *WHILE* stunned and many other defensive cooldowns layed on top of that.
ESO have blocks, shields, and dodge rolls with a passive skill to reduce damage by alot while blocking.
Even the one of the oldest game, Dark age of Camelot, a healer didn't just fall over and die when 3-4 dps jumped on them, they had cooldowns and abilities to stay alive.
HERE'S OUR GAME:
5 people target one person, Hes stunned, Hes is silenced, he purifies it, OH LOOK hes dead. (Is that fun to him or his team? No) OR it could go something like this, He goes in, 5 people target him, HE pops guard and all CC'S AND DAMAGE wasted and hes fine, ALL countered cause he saw their zerg tactic play so now their team is at a disadvantage cause he read them. Do you know how frustrating it is when everyone is scared to go engage cause they know they will pop like a grape within 1.5 and die while spamming recoup. That's why the devs added guard for that reason. No amount of healing from a healer and spamming recoup will save you from dying while you have 5 people focus targeting you
Those said MMO's I talked about have MANY abilities and skills to avoid getting zerged down and killed in 2-3 seconds, ours is only ONE skill, Guard and its not that great due to snapback thus making all the damage going through even though you activate it and if you sit there in guard for 5 seconds while at 5% health, one skill can pretty much kill you as soon as you leave it. Those said mmo's people only died when all their resources were used up and they were caught without them. If zerging a healer or *someone* was a viable strat with no counter then that's not good gameplay and would be frustrating to anyone who died by that said strat.