They lack risk because WvW is a poorly designed, dysfunctional game mode that is also largely at odds with how the combat and classes were designed in this game. High ranged burst is much more balanced in PvP where there is lots of line-of-sight, where at some point you will need to fight on a capture point, etc.
WvW is about clowning, PvE and roleplaying. As a PvP game it is a joke, which is why it and every game like it is so unsuccessful. It's a PvP game that mostly provides bad, low skilled PvP.
No, not 'nope;'. Downstate favours more experienced, organised, skilled players and it increases the skill cap because it adds extra decision making, teamwork, buildcraft and so on. Which is why if we grab the 5 players who win this months AT and put them against 5 average WvW players, then those AT players will generally handle downstate better.
No, its an example of why it is low skilled, uncompetitve trash. If the 5 are significantly better than the 20 they wouldn't face them in a decent, skilled PvP game, but really that is secondary, what is more common is the 5 are on builds that can engage then disengage and there is no trade off to that, because the game mode is a dysfunctional joke.