What you are considering a liability to the character is actually an asset. Voyager's ability to survive a 70 year trip home hangs on their commander's ability to change.
Wow Janeway did something in 7 years that Kirk and/or Picard could have done in an hour to a few days. [sarcasm]That is so impressive[/sarcasm]
Seriously all that establishes is that Janeway didn't stop and ask directions, hell even with all the big jumps Voyager made they never made it out of the Delta Quadrant.
What, was Voyager just flying around in a giant circle for 7 years?