No, I merely continued the example with easy numbers that both you and the OP used, figuring you were both capable of seeing how it related to the real game. I'll backtrack to try and clarify for you.
If damage is spaced out over time (as oppose to being delivered all at once), then you've got more chances to react to that damage. You can take some DPS damage to figure out how bad the situation is, you don't have that chance with Burst damage.
Crit is unpredictable burst for auto attacks. It randomly deals a burst of 2.5 times as much damage as normal, which makes it impossible to tell how fast you'll be chunked out, and if that burst happens right at the tail end you die when you otherwise would have been able to react.
Crit originated in PvE games as a way to get lucky shots off on NPCs. It's still OK when gated by conditions (a crit when coming out of stealth, for instance), but it doesn't really have a spot in PvP games. If randomly doing extra damage was a healthy mechanic for the game, then it wouldn't be limited to Auto Attacks, it'd be OK on spells too.