Perhaps, but have you ever seen a comic book or adventure story where it was actually possible to just go straight to the bad guy?
Generally speaking, they have to get past the grunts, fight the second lieutenant, disable the alarm system, break into the badguys chambers, avoid being seduced by his hot assistant(who then usually goes and sides with the good guys). Then they finally get to the bad guy, who they fight for a little while before he unleashes his doomsday plot(if he hasn't already) which when causes the party to split up while some of them try to disable the device and others continue fighting the bad guy(who now usually gets away because the remaining heroes aren't enough to beat him).
That aside, even heroes have to gain experience before they fight. Wolverine and Cyclops may be tough enough to fight Juggernaut, but the new trainees aren't going to have those skills. This is usually done by helping out on lesser missions or doing training.
In any case avoiding the encounter entirely is generally not beneficial, as you won't get the required skills and experience. HOWEVER, if players come up with a creative way to avoid the encounter(such as scaling a cliff to avoid a goblin warren up the road), that IMO rewards them with at least the experience of having actually accomplished the encounter.