I believe that this puzzle is very good at teaching an essential lesson: If the "good" route can't work, then there is another way, even if it seems "impossible". Always be ready to fully reset your mind to be able to see it.
:D
On 2nd try. Had a 2 off on first try, that was luckily easy to solve as it "happened" close to the end, so that I just had to step back a bit. Lazy me not fan of long distances... :D