Jungle has the most map presence and top has the least.
If you die once in top, if the other player is good, the game can already be over for you.
Top is extremely matchup dependent and unforgiving compared to other roles.
Jungler - Hardest objectives , ganks ect.
Top - Because if you play Shen , you should look the minimap almost all the time.
Mid - Easy , just playing safe - eventually if playing Ryze , veigar , malza they scale late
Adc/Supp - Easy just again safe play and everything is alright.